Code quality checks

public/worklets/bytebeat-processor.js

@@ -0,0 +1,89 @@
+class BytebeatProcessor extends AudioWorkletProcessor {
+  constructor() {
+    super()
+
+    this.t = 0
+    this.a = 8
+    this.b = 16
+    this.c = 32
+    this.d = 64
+    this.formula = null
+    this.compiledFormula = null
+    this.sampleRate = 8000
+    this.duration = 4
+    this.loopLength = this.sampleRate * this.duration
+    this.playbackRate = 1.0
+    this.error = false
+
+    this.port.onmessage = (event) => {
+      const { type, value } = event.data
+      switch (type) {
+        case 'formula':
+          this.setFormula(value)
+          break
+        case 'variables':
+          this.a = value.a ?? this.a
+          this.b = value.b ?? this.b
+          this.c = value.c ?? this.c
+          this.d = value.d ?? this.d
+          break
+        case 'reset':
+          this.t = 0
+          break
+        case 'loopLength':
+          this.loopLength = value
+          break
+        case 'playbackRate':
+          this.playbackRate = value
+          break
+      }
+    }
+  }
+
+  setFormula(formulaString) {
+    try {
+      this.compiledFormula = new Function('t', 'a', 'b', 'c', 'd', `return ${formulaString}`)
+      this.formula = formulaString
+      this.error = false
+    } catch (e) {
+      console.error('Failed to compile bytebeat formula:', e)
+      this.error = true
+      this.compiledFormula = null
+    }
+  }
+
+  process(inputs, outputs) {
+    const output = outputs[0]
+
+    if (output.length > 0) {
+      const outputChannel = output[0]
+
+      for (let i = 0; i < outputChannel.length; i++) {
+        if (!this.compiledFormula || this.error) {
+          outputChannel[i] = 0
+        } else {
+          try {
+            const value = this.compiledFormula(this.t, this.a, this.b, this.c, this.d)
+            const byteValue = value & 0xFF
+            outputChannel[i] = (byteValue - 128) / 128
+          } catch (e) {
+            outputChannel[i] = 0
+            if (!this.error) {
+              console.error('Bytebeat runtime error:', e)
+              this.error = true
+            }
+          }
+        }
+
+        this.t += this.playbackRate
+        if (this.loopLength > 0 && this.t >= this.loopLength) {
+          this.t = 0
+        }
+      }
+    }
+
+    return true
+  }
+}
+
+registerProcessor('bytebeat-processor', BytebeatProcessor)

public/worklets/fold-crush-processor.js

@@ -2,7 +2,7 @@ class FoldCrushProcessor extends AudioWorkletProcessor {
   constructor() {
     super()
 
-    this.clipMode = 'wrap'
+    this.clipMode = 'fold'
     this.drive = 1
     this.bitDepth = 16
     this.crushAmount = 0
@@ -28,39 +28,63 @@ class FoldCrushProcessor extends AudioWorkletProcessor {
     }
   }
 
-  wrap(sample) {
-    const range = 2.0
-    let wrapped = sample
-    while (wrapped > 1.0) wrapped -= range
-    while (wrapped < -1.0) wrapped += range
-    return wrapped
+  clamp(x, min, max) {
+    return Math.max(min, Math.min(max, x))
   }
 
-  clamp(sample) {
-    return Math.max(-1.0, Math.min(1.0, sample))
+  mod(x, y) {
+    return ((x % y) + y) % y
   }
 
-  fold(sample) {
-    let folded = sample
-    while (folded > 1.0 || folded < -1.0) {
-      if (folded > 1.0) {
-        folded = 2.0 - folded
+  squash(x) {
+    return x / (1 + Math.abs(x))
   }
-      if (folded < -1.0) {
-        folded = -2.0 - folded
+
+  soft(x, k) {
+    return Math.tanh(x * (1 + k))
   }
+
+  hard(x, k) {
+    return this.clamp((1 + k) * x, -1, 1)
   }
-    return folded
+
+  fold(x, k) {
+    let y = (1 + 0.5 * k) * x
+    const window = this.mod(y + 1, 4)
+    return 1 - Math.abs(window - 2)
+  }
+
+  cubic(x, k) {
+    const t = this.squash(Math.log1p(k))
+    const cubic = (x - (t / 3) * x * x * x) / (1 - t / 3)
+    return this.soft(cubic, k)
+  }
+
+  diode(x, k) {
+    const g = 1 + 2 * k
+    const t = this.squash(Math.log1p(k))
+    const bias = 0.07 * t
+    const pos = this.soft(x + bias, 2 * k)
+    const neg = this.soft(-x + bias, 2 * k)
+    const y = pos - neg
+    const sech = 1 / Math.cosh(g * bias)
+    const sech2 = sech * sech
+    const denom = Math.max(1e-8, 2 * g * sech2)
+    return this.soft(y / denom, k)
   }
 
   processWavefolder(sample) {
     switch (this.clipMode) {
-      case 'wrap':
-        return this.wrap(sample)
-      case 'clamp':
-        return this.clamp(sample)
+      case 'soft':
+        return this.soft(sample, this.drive)
+      case 'hard':
+        return this.hard(sample, this.drive)
       case 'fold':
-        return this.fold(sample)
+        return this.fold(sample, this.drive)
+      case 'cubic':
+        return this.cubic(sample, this.drive)
+      case 'diode':
+        return this.diode(sample, this.drive)
       default:
         return sample
     }
@@ -86,6 +110,14 @@ class FoldCrushProcessor extends AudioWorkletProcessor {
     }
   }
 
+  safetyLimiter(sample) {
+    const threshold = 0.8
+    if (Math.abs(sample) > threshold) {
+      return Math.tanh(sample * 0.9) / Math.tanh(0.9)
+    }
+    return sample
+  }
+
   process(inputs, outputs) {
     const input = inputs[0]
     const output = outputs[0]
@@ -95,9 +127,9 @@ class FoldCrushProcessor extends AudioWorkletProcessor {
       const outputChannel = output[0]
 
       for (let i = 0; i < inputChannel.length; i++) {
-        const driven = inputChannel[i] * this.drive
-        let processed = this.processWavefolder(driven)
+        let processed = this.processWavefolder(inputChannel[i])
         processed = this.processBitcrush(processed)
+        processed = this.safetyLimiter(processed)
         outputChannel[i] = processed
       }
     }

public/worklets/output-limiter.js

@@ -0,0 +1,60 @@
+class OutputLimiter extends AudioWorkletProcessor {
+  static get parameterDescriptors() {
+    return [
+      {
+        name: 'threshold',
+        defaultValue: 0.8,
+        minValue: 0.1,
+        maxValue: 1.0,
+        automationRate: 'k-rate'
+      },
+      {
+        name: 'makeup',
+        defaultValue: 1.5,
+        minValue: 1.0,
+        maxValue: 3.0,
+        automationRate: 'k-rate'
+      }
+    ]
+  }
+
+  constructor() {
+    super()
+  }
+
+  softClip(x, threshold) {
+    if (Math.abs(x) < threshold) {
+      return x
+    }
+    const sign = x < 0 ? -1 : 1
+    const scaled = (Math.abs(x) - threshold) / (1 - threshold)
+    return sign * (threshold + (1 - threshold) * Math.tanh(scaled))
+  }
+
+  process(inputs, outputs, parameters) {
+    const input = inputs[0]
+    const output = outputs[0]
+
+    if (input.length === 0 || output.length === 0) {
+      return true
+    }
+
+    const threshold = parameters.threshold[0]
+    const makeup = parameters.makeup[0]
+
+    for (let channel = 0; channel < input.length; channel++) {
+      const inputChannel = input[channel]
+      const outputChannel = output[channel]
+
+      for (let i = 0; i < inputChannel.length; i++) {
+        let sample = inputChannel[i] * makeup
+        sample = this.softClip(sample, threshold)
+        outputChannel[i] = sample
+      }
+    }
+
+    return true
+  }
+}
+
+registerProcessor('output-limiter', OutputLimiter)

public/worklets/svf-processor.js

@@ -0,0 +1,103 @@
+class SVFProcessor extends AudioWorkletProcessor {
+  static get parameterDescriptors() {
+    return [
+      {
+        name: 'frequency',
+        defaultValue: 1000,
+        minValue: 20,
+        maxValue: 20000,
+        automationRate: 'k-rate'
+      },
+      {
+        name: 'resonance',
+        defaultValue: 0.707,
+        minValue: 0.05,
+        maxValue: 10,
+        automationRate: 'k-rate'
+      }
+    ]
+  }
+
+  constructor() {
+    super()
+
+    this.mode = 'lowpass'
+    this.ic1eq = 0
+    this.ic2eq = 0
+
+    this.port.onmessage = (event) => {
+      const { type, value } = event.data
+      if (type === 'mode') {
+        this.mode = value
+      }
+    }
+  }
+
+  process(inputs, outputs, parameters) {
+    const input = inputs[0]
+    const output = outputs[0]
+
+    if (input.length === 0 || output.length === 0) {
+      return true
+    }
+
+    const inputChannel = input[0]
+    const outputChannel = output[0]
+    const frequency = parameters.frequency
+    const resonance = parameters.resonance
+
+    const sampleRate = globalThis.sampleRate || 44100
+    const isFreqArray = frequency.length > 1
+    const isResArray = resonance.length > 1
+
+    for (let i = 0; i < inputChannel.length; i++) {
+      const freq = isFreqArray ? frequency[i] : frequency[0]
+      const res = isResArray ? resonance[i] : resonance[0]
+
+      const g = Math.tan(Math.PI * Math.min(freq, sampleRate * 0.49) / sampleRate)
+      const k = 1 / Math.max(0.05, res)
+
+      const inputSample = inputChannel[i]
+
+      const a1 = 1 / (1 + g * (g + k))
+      const a2 = g * a1
+      const a3 = g * a2
+
+      const v3 = inputSample - this.ic2eq
+      const v1 = a1 * this.ic1eq + a2 * v3
+      const v2 = this.ic2eq + a2 * this.ic1eq + a3 * v3
+
+      this.ic1eq = 2 * v1 - this.ic1eq
+      this.ic2eq = 2 * v2 - this.ic2eq
+
+      const lp = v2
+      const bp = v1
+      const hp = inputSample - k * v1 - v2
+      const notch = inputSample - k * v1
+
+      let outSample
+      switch (this.mode) {
+        case 'lowpass':
+          outSample = lp
+          break
+        case 'highpass':
+          outSample = hp
+          break
+        case 'bandpass':
+          outSample = bp
+          break
+        case 'notch':
+          outSample = notch
+          break
+        default:
+          outSample = lp
+      }
+
+      outputChannel[i] = outSample
+    }
+
+    return true
+  }
+}
+
+registerProcessor('svf-processor', SVFProcessor)

src/App.tsx

@@ -1,47 +1,146 @@
 import { useState, useRef, useEffect } from 'react'
 import { useStore } from '@nanostores/react'
+import { Square, Archive, Dices, Sparkles } from 'lucide-react'
 import { PlaybackManager } from './services/PlaybackManager'
 import { DownloadService } from './services/DownloadService'
-import { generateFormulaGrid, generateRandomFormula } from './utils/bytebeatFormulas'
+import { generateTileGrid, generateRandomFormula } from './utils/bytebeatFormulas'
 import { BytebeatTile } from './components/BytebeatTile'
 import { EffectsBar } from './components/EffectsBar'
 import { EngineControls } from './components/EngineControls'
+import { FormulaEditor } from './components/FormulaEditor'
+import { LFOPanel } from './components/LFOPanel'
+import { AudioContextWarning } from './components/AudioContextWarning'
+import { HelpModal } from './components/HelpModal'
 import { getSampleRateFromIndex } from './config/effects'
-import { engineSettings, effectSettings } from './stores/settings'
+import { engineSettings, effectSettings, lfoSettings, type LFOConfig } from './stores/settings'
+import { exitMappingMode } from './stores/mappingMode'
+import { useKeyboardShortcuts } from './hooks/useKeyboardShortcuts'
+import { useTileParams } from './hooks/useTileParams'
+import type { TileState } from './types/tiles'
+import { createTileStateFromCurrent, loadTileParams, randomizeTileParams } from './utils/tileState'
+import { DEFAULT_VARIABLES, PLAYBACK_ID, TILE_GRID, DEFAULT_DOWNLOAD_OPTIONS, LOOP_DURATION } from './constants/defaults'
+import { getTileId, getTileFromGrid, type FocusedTile } from './utils/tileHelpers'
 
 function App() {
   const engineValues = useStore(engineSettings)
   const effectValues = useStore(effectSettings)
 
-  const [formulas, setFormulas] = useState<string[][]>(() =>
-    generateFormulaGrid(100, 2, engineValues.complexity)
+  const [tiles, setTiles] = useState<TileState[][]>(() =>
+    generateTileGrid(TILE_GRID.SIZE, TILE_GRID.COLUMNS, engineValues.complexity)
   )
   const [playing, setPlaying] = useState<string | null>(null)
   const [queued, setQueued] = useState<string | null>(null)
-  const [regenerating, setRegenerating] = useState<string | null>(null)
   const [playbackPosition, setPlaybackPosition] = useState<number>(0)
   const [downloading, setDownloading] = useState(false)
+  const [focusedTile, setFocusedTile] = useState<FocusedTile>({ row: 0, col: 0 })
+  const [customTile, setCustomTile] = useState<TileState>(() => createTileStateFromCurrent('t*(8&t>>9)'))
+  const [showWarning, setShowWarning] = useState(true)
+  const [showHelp, setShowHelp] = useState(false)
   const playbackManagerRef = useRef<PlaybackManager | null>(null)
   const downloadServiceRef = useRef<DownloadService>(new DownloadService())
-  const animationFrameRef = useRef<number | null>(null)
-  const formulasRef = useRef<string[][]>(formulas)
+  const switchTimerRef = useRef<number | null>(null)
+
+  const { saveCurrentTileParams } = useTileParams({ tiles, setTiles, customTile, setCustomTile, focusedTile })
 
   useEffect(() => {
-    formulasRef.current = formulas
-  }, [formulas])
+    if (playbackManagerRef.current) {
+      playbackManagerRef.current.setPlaybackPositionCallback(setPlaybackPosition)
+    }
+  }, [])
 
   useEffect(() => {
     effectSettings.setKey('masterVolume', engineValues.masterVolume)
   }, [engineValues.masterVolume])
 
+  const clearSwitchTimer = () => {
+    if (switchTimerRef.current !== null) {
+      clearTimeout(switchTimerRef.current)
+      switchTimerRef.current = null
+    }
+  }
+
+  const startSwitchTimer = (queuedId: string) => {
+    clearSwitchTimer()
+
+    switchTimerRef.current = window.setTimeout(() => {
+      const [rowStr, colStr] = queuedId.split('-')
+      const row = parseInt(rowStr, 10)
+      const col = parseInt(colStr, 10)
+      const tile = getTileFromGrid(tiles, row, col)
+
+      if (tile) {
+        playFormula(tile.formula, queuedId)
+      }
+    }, engineValues.loopCount * 1000)
+  }
+
+  useEffect(() => {
+    return () => clearSwitchTimer()
+  }, [])
+
   const handleRandom = () => {
-    setFormulas(generateFormulaGrid(100, 2, engineValues.complexity))
+    clearSwitchTimer()
+    setTiles(generateTileGrid(TILE_GRID.SIZE, TILE_GRID.COLUMNS, engineValues.complexity))
+    setQueued(null)
+  }
+
+  const handleRandomizeAllParams = () => {
+    clearSwitchTimer()
+    let newRandomized: TileState | null = null
+
+    if (playing === PLAYBACK_ID.CUSTOM) {
+      setCustomTile(prev => {
+        const randomized = randomizeTileParams(prev)
+        newRandomized = randomized
+        return randomized
+      })
+    } else {
+      setTiles(prevTiles => {
+        const newTiles = prevTiles.map((row, rowIdx) =>
+          row.map((tile, colIdx) => {
+            const randomized = randomizeTileParams(tile)
+            if (playing && focusedTile !== 'custom') {
+              const tileId = getTileId(focusedTile.row, focusedTile.col)
+              if (playing === tileId && rowIdx === focusedTile.row && colIdx === focusedTile.col) {
+                newRandomized = randomized
+              }
+            }
+            return randomized
+          })
+        )
+        return newTiles
+      })
+
+      setCustomTile(prev => randomizeTileParams(prev))
+    }
+
+    if (newRandomized && playbackManagerRef.current) {
+      const params = newRandomized as TileState
+      loadTileParams(params)
+
+      playbackManagerRef.current.setEffects(params.effectParams)
+      playbackManagerRef.current.setVariables(
+        params.engineParams.a ?? DEFAULT_VARIABLES.a,
+        params.engineParams.b ?? DEFAULT_VARIABLES.b,
+        params.engineParams.c ?? DEFAULT_VARIABLES.c,
+        params.engineParams.d ?? DEFAULT_VARIABLES.d
+      )
+      playbackManagerRef.current.setPitch(params.engineParams.pitch ?? 1.0)
+
+      if (params.lfoConfigs) {
+        playbackManagerRef.current.setLFOConfig(0, params.lfoConfigs.lfo1)
+        playbackManagerRef.current.setLFOConfig(1, params.lfoConfigs.lfo2)
+        playbackManagerRef.current.setLFOConfig(2, params.lfoConfigs.lfo3)
+        playbackManagerRef.current.setLFOConfig(3, params.lfoConfigs.lfo4)
+      }
+    }
+
     setQueued(null)
   }
 
   const playFormula = async (formula: string, id: string) => {
     const sampleRate = getSampleRateFromIndex(engineValues.sampleRate)
-    const duration = engineValues.loopDuration
+    const duration = LOOP_DURATION
 
     if (!playbackManagerRef.current) {
       playbackManagerRef.current = new PlaybackManager({ sampleRate, duration })
@@ -51,60 +150,46 @@ function App() {
 
     playbackManagerRef.current.stop()
     playbackManagerRef.current.setEffects(effectValues)
-    playbackManagerRef.current.setPitch(engineValues.pitch ?? 1)
+    playbackManagerRef.current.setVariables(
+      engineValues.a ?? DEFAULT_VARIABLES.a,
+      engineValues.b ?? DEFAULT_VARIABLES.b,
+      engineValues.c ?? DEFAULT_VARIABLES.c,
+      engineValues.d ?? DEFAULT_VARIABLES.d
+    )
+    playbackManagerRef.current.setPitch(engineValues.pitch ?? 1.0)
 
-    const success = await playbackManagerRef.current.play(formula, sampleRate, duration)
-
-    if (success) {
+    await playbackManagerRef.current.play(formula)
     setPlaying(id)
     setQueued(null)
-      startPlaybackTracking()
-    } else {
-      console.error('Failed to play formula')
-    }
+    return true
   }
 
-  const startPlaybackTracking = () => {
-    if (animationFrameRef.current) {
-      cancelAnimationFrame(animationFrameRef.current)
+  const handleTileClick = (_formula: string, row: number, col: number, isDoubleClick: boolean = false) => {
+    const id = getTileId(row, col)
+    const tile = getTileFromGrid(tiles, row, col)
+
+    if (!tile) return
+
+    if (focusedTile === 'custom' || (focusedTile.row !== row || focusedTile.col !== col)) {
+      saveCurrentTileParams()
     }
 
-    const updatePosition = () => {
-      if (playbackManagerRef.current) {
-        const position = playbackManagerRef.current.getPlaybackPosition()
-        setPlaybackPosition(position)
-        animationFrameRef.current = requestAnimationFrame(updatePosition)
+    if (tile) {
+      loadTileParams(tile)
     }
-    }
-    updatePosition()
-  }
-
-  const handleTileClick = (formula: string, row: number, col: number, isDoubleClick: boolean = false) => {
-    const id = `${row}-${col}`
+    setFocusedTile({ row, col })
 
     if (playing === id) {
-      playbackManagerRef.current?.stop()
-      setPlaying(null)
-      setQueued(null)
-      if (animationFrameRef.current) {
-        cancelAnimationFrame(animationFrameRef.current)
-        animationFrameRef.current = null
-      }
+      handleStop()
       return
     }
 
     if (isDoubleClick || playing === null) {
-      playFormula(formula, id)
+      clearSwitchTimer()
+      playFormula(tile.formula, id)
     } else {
       setQueued(id)
-      if (playbackManagerRef.current) {
-        playbackManagerRef.current.scheduleNextTrack(() => {
-          const queuedFormula = formulasRef.current.flat()[parseInt(id.split('-')[0]) * 2 + parseInt(id.split('-')[1])]
-          if (queuedFormula) {
-            playFormula(queuedFormula, id)
-          }
-        })
-      }
+      startSwitchTimer(id)
     }
   }
 
@@ -113,99 +198,433 @@ function App() {
   }
 
 
-  const handleEngineChange = (parameterId: string, value: number) => {
+  const handleEngineChange = async (parameterId: string, value: number) => {
     engineSettings.setKey(parameterId as keyof typeof engineValues, value)
+    saveCurrentTileParams()
 
     if (parameterId === 'masterVolume' && playbackManagerRef.current) {
       playbackManagerRef.current.setEffects({ ...effectValues, masterVolume: value })
     }
 
-    if (parameterId === 'pitch' && playbackManagerRef.current) {
+    if (parameterId === 'pitch' && playbackManagerRef.current && playing) {
       playbackManagerRef.current.setPitch(value)
     }
+
+    if (['a', 'b', 'c', 'd'].includes(parameterId) && playbackManagerRef.current && playing) {
+      const updatedValues = { ...engineValues, [parameterId]: value }
+      playbackManagerRef.current.setVariables(
+        updatedValues.a ?? DEFAULT_VARIABLES.a,
+        updatedValues.b ?? DEFAULT_VARIABLES.b,
+        updatedValues.c ?? DEFAULT_VARIABLES.c,
+        updatedValues.d ?? DEFAULT_VARIABLES.d
+      )
+    }
   }
 
-  const handleEffectChange = (parameterId: string, value: number | boolean) => {
-    effectSettings.setKey(parameterId as any, value as any)
+  const handleEffectChange = (parameterId: string, value: number | boolean | string) => {
+    effectSettings.setKey(parameterId as keyof typeof effectValues, value as never)
+    saveCurrentTileParams()
+
     if (playbackManagerRef.current) {
       playbackManagerRef.current.setEffects(effectValues)
     }
   }
 
+  const handleLFOChange = (lfoIndex: number, config: LFOConfig) => {
+    if (playbackManagerRef.current) {
+      playbackManagerRef.current.setLFOConfig(lfoIndex, config)
+    }
+  }
+
+  const handleParameterMapClick = (paramId: string, lfoIndex: number) => {
+    const lfoKey = `lfo${lfoIndex + 1}` as 'lfo1' | 'lfo2' | 'lfo3' | 'lfo4'
+    const currentLFO = lfoSettings.get()[lfoKey]
+
+    const existingMappingIndex = currentLFO.mappings.findIndex(m => m.targetParam === paramId)
+
+    let updatedMappings
+    if (existingMappingIndex >= 0) {
+      updatedMappings = currentLFO.mappings.filter((_, i) => i !== existingMappingIndex)
+    } else {
+      updatedMappings = [...currentLFO.mappings, { targetParam: paramId, depth: 50 }]
+    }
+
+    const updatedLFO = { ...currentLFO, mappings: updatedMappings }
+    lfoSettings.setKey(lfoKey, updatedLFO)
+
+    if (playbackManagerRef.current) {
+      playbackManagerRef.current.setLFOConfig(lfoIndex, updatedLFO)
+    }
+
+    saveCurrentTileParams()
+
+    if (updatedMappings.length === 0 || existingMappingIndex >= 0) {
+      exitMappingMode()
+    }
+  }
+
+  const handleUpdateMappingDepth = (lfoIndex: number, paramId: string, depth: number) => {
+    const lfoKey = `lfo${lfoIndex + 1}` as 'lfo1' | 'lfo2' | 'lfo3' | 'lfo4'
+    const currentLFO = lfoSettings.get()[lfoKey]
+
+    const updatedMappings = currentLFO.mappings.map(m =>
+      m.targetParam === paramId ? { ...m, depth } : m
+    )
+
+    const updatedLFO = { ...currentLFO, mappings: updatedMappings }
+    lfoSettings.setKey(lfoKey, updatedLFO)
+
+    if (playbackManagerRef.current) {
+      playbackManagerRef.current.setLFOConfig(lfoIndex, updatedLFO)
+    }
+
+    saveCurrentTileParams()
+  }
+
+  const handleRemoveMapping = (lfoIndex: number, paramId: string) => {
+    const lfoKey = `lfo${lfoIndex + 1}` as 'lfo1' | 'lfo2' | 'lfo3' | 'lfo4'
+    const currentLFO = lfoSettings.get()[lfoKey]
+
+    const updatedMappings = currentLFO.mappings.filter(m => m.targetParam !== paramId)
+
+    const updatedLFO = { ...currentLFO, mappings: updatedMappings }
+    lfoSettings.setKey(lfoKey, updatedLFO)
+
+    if (playbackManagerRef.current) {
+      playbackManagerRef.current.setLFOConfig(lfoIndex, updatedLFO)
+    }
+
+    saveCurrentTileParams()
+  }
+
+  const getMappedLFOs = (paramId: string): number[] => {
+    const lfos = lfoSettings.get()
+    const mapped: number[] = []
+
+    Object.entries(lfos).forEach(([, lfo], index) => {
+      if (lfo.mappings.some((m: { targetParam: string }) => m.targetParam === paramId)) {
+        mapped.push(index)
+      }
+    })
+
+    return mapped
+  }
+
   const handleDownloadAll = async () => {
     setDownloading(true)
-    await downloadServiceRef.current.downloadAll(formulas, { duration: 10, bitDepth: 8 })
+    const formulas = tiles.map(row => row.map(tile => tile.formula))
+    await downloadServiceRef.current.downloadAll(formulas, {
+      duration: DEFAULT_DOWNLOAD_OPTIONS.DURATION,
+      bitDepth: DEFAULT_DOWNLOAD_OPTIONS.BIT_DEPTH
+    })
     setDownloading(false)
   }
 
   const handleDownloadFormula = (formula: string, filename: string) => {
-    downloadServiceRef.current.downloadFormula(formula, filename, { duration: 10, bitDepth: 8 })
+    downloadServiceRef.current.downloadFormula(formula, filename, {
+      duration: DEFAULT_DOWNLOAD_OPTIONS.DURATION,
+      bitDepth: DEFAULT_DOWNLOAD_OPTIONS.BIT_DEPTH
+    })
   }
 
   const handleRegenerate = (row: number, col: number) => {
-    const id = `${row}-${col}`
     const newFormula = generateRandomFormula(engineValues.complexity)
+    const newTile = createTileStateFromCurrent(newFormula)
 
-    if (playing === id && playbackManagerRef.current) {
-      setRegenerating(id)
-      playbackManagerRef.current.scheduleNextTrack(() => {
-        setFormulas(prevFormulas => {
-          const newFormulas = [...prevFormulas]
-          newFormulas[row] = [...newFormulas[row]]
-          newFormulas[row][col] = newFormula
-          return newFormulas
+    setTiles(prevTiles => {
+      const newTiles = [...prevTiles]
+      newTiles[row] = [...newTiles[row]]
+      newTiles[row][col] = newTile
+      return newTiles
     })
-        playFormula(newFormula, id)
-        setRegenerating(null)
+  }
+
+  const handleStop = () => {
+    clearSwitchTimer()
+    playbackManagerRef.current?.stop()
+    setPlaying(null)
+    setQueued(null)
+    setPlaybackPosition(0)
+  }
+
+  const handleCustomEvaluate = (formula: string) => {
+    if (focusedTile !== 'custom') {
+      saveCurrentTileParams()
+      loadTileParams(customTile)
+    }
+
+    setFocusedTile('custom')
+    setCustomTile({ ...customTile, formula })
+    playFormula(formula, PLAYBACK_ID.CUSTOM)
+  }
+
+  const handleCustomStop = () => {
+    if (playing === PLAYBACK_ID.CUSTOM) {
+      handleStop()
+    }
+  }
+
+  const handleCustomRandom = () => {
+    return generateRandomFormula(engineValues.complexity)
+  }
+
+  const moveFocus = (direction: 'up' | 'down' | 'left' | 'right', step: number = 1) => {
+    saveCurrentTileParams()
+
+    setFocusedTile(prev => {
+      if (prev === 'custom') return prev
+
+      let { row, col } = prev
+      const maxRow = tiles.length - 1
+      const maxCol = (tiles[row]?.length || 1) - 1
+
+      switch (direction) {
+        case 'up':
+          row = Math.max(0, row - step)
+          break
+        case 'down':
+          row = Math.min(maxRow, row + step)
+          break
+        case 'left':
+          col = Math.max(0, col - step)
+          break
+        case 'right':
+          col = Math.min(maxCol, col + step)
+          break
+      }
+
+      const newTile = tiles[row]?.[col]
+      if (newTile) {
+        loadTileParams(newTile)
+        return { row, col }
+      }
+
+      return prev
+    })
+  }
+
+  const handleKeyboardSpace = () => {
+    if (playing) {
+      handleStop()
+    } else if (focusedTile !== 'custom') {
+      const tile = tiles[focusedTile.row]?.[focusedTile.col]
+      if (tile) {
+        handleTileClick(tile.formula, focusedTile.row, focusedTile.col, true)
+      }
+    }
+  }
+
+  const handleKeyboardEnter = () => {
+    if (focusedTile !== 'custom') {
+      const tile = tiles[focusedTile.row]?.[focusedTile.col]
+      if (tile) {
+        handleTileClick(tile.formula, focusedTile.row, focusedTile.col, false)
+      }
+    }
+  }
+
+  const handleKeyboardDoubleEnter = () => {
+    if (focusedTile !== 'custom') {
+      const tile = tiles[focusedTile.row]?.[focusedTile.col]
+      if (tile) {
+        handleTileClick(tile.formula, focusedTile.row, focusedTile.col, true)
+      }
+    }
+  }
+
+  const handleKeyboardR = () => {
+    if (focusedTile !== 'custom') {
+      handleRegenerate(focusedTile.row, focusedTile.col)
+    }
+  }
+
+  const handleKeyboardShiftR = () => {
+    handleRandom()
+  }
+
+  const handleEscape = () => {
+    exitMappingMode()
+  }
+
+  const handleKeyboardC = () => {
+    if (focusedTile === 'custom') {
+      setCustomTile(prev => {
+        const randomized = randomizeTileParams(prev)
+        loadTileParams(randomized)
+
+        if (playing === PLAYBACK_ID.CUSTOM && playbackManagerRef.current) {
+          playbackManagerRef.current.setEffects(randomized.effectParams)
+          playbackManagerRef.current.setVariables(
+            randomized.engineParams.a ?? DEFAULT_VARIABLES.a,
+            randomized.engineParams.b ?? DEFAULT_VARIABLES.b,
+            randomized.engineParams.c ?? DEFAULT_VARIABLES.c,
+            randomized.engineParams.d ?? DEFAULT_VARIABLES.d
+          )
+          playbackManagerRef.current.setPitch(randomized.engineParams.pitch ?? 1.0)
+
+          if (randomized.lfoConfigs) {
+            playbackManagerRef.current.setLFOConfig(0, randomized.lfoConfigs.lfo1)
+            playbackManagerRef.current.setLFOConfig(1, randomized.lfoConfigs.lfo2)
+            playbackManagerRef.current.setLFOConfig(2, randomized.lfoConfigs.lfo3)
+            playbackManagerRef.current.setLFOConfig(3, randomized.lfoConfigs.lfo4)
+          }
+        }
+
+        return randomized
       })
     } else {
-      setFormulas(prevFormulas => {
-        const newFormulas = [...prevFormulas]
-        newFormulas[row] = [...newFormulas[row]]
-        newFormulas[row][col] = newFormula
-        return newFormulas
+      const tileId = getTileId(focusedTile.row, focusedTile.col)
+      setTiles(prevTiles => {
+        const newTiles = [...prevTiles]
+        newTiles[focusedTile.row] = [...newTiles[focusedTile.row]]
+        const randomized = randomizeTileParams(newTiles[focusedTile.row][focusedTile.col])
+        newTiles[focusedTile.row][focusedTile.col] = randomized
+
+        loadTileParams(randomized)
+
+        if (playing === tileId && playbackManagerRef.current) {
+          playbackManagerRef.current.setEffects(randomized.effectParams)
+          playbackManagerRef.current.setVariables(
+            randomized.engineParams.a ?? DEFAULT_VARIABLES.a,
+            randomized.engineParams.b ?? DEFAULT_VARIABLES.b,
+            randomized.engineParams.c ?? DEFAULT_VARIABLES.c,
+            randomized.engineParams.d ?? DEFAULT_VARIABLES.d
+          )
+          playbackManagerRef.current.setPitch(randomized.engineParams.pitch ?? 1.0)
+
+          if (randomized.lfoConfigs) {
+            playbackManagerRef.current.setLFOConfig(0, randomized.lfoConfigs.lfo1)
+            playbackManagerRef.current.setLFOConfig(1, randomized.lfoConfigs.lfo2)
+            playbackManagerRef.current.setLFOConfig(2, randomized.lfoConfigs.lfo3)
+            playbackManagerRef.current.setLFOConfig(3, randomized.lfoConfigs.lfo4)
+          }
+        }
+
+        return newTiles
       })
     }
   }
 
+  const handleKeyboardShiftC = () => {
+    handleRandomizeAllParams()
+  }
+
+  const handleDismissWarning = () => {
+    setShowWarning(false)
+  }
+
+  useKeyboardShortcuts({
+    onSpace: handleKeyboardSpace,
+    onArrowUp: (shift) => moveFocus('up', shift ? 10 : 1),
+    onArrowDown: (shift) => moveFocus('down', shift ? 10 : 1),
+    onArrowLeft: (shift) => moveFocus('left', shift ? 10 : 1),
+    onArrowRight: (shift) => moveFocus('right', shift ? 10 : 1),
+    onEnter: handleKeyboardEnter,
+    onDoubleEnter: handleKeyboardDoubleEnter,
+    onR: handleKeyboardR,
+    onShiftR: handleKeyboardShiftR,
+    onC: handleKeyboardC,
+    onShiftC: handleKeyboardShiftC,
+    onEscape: handleEscape
+  })
+
+  useEffect(() => {
+    if (focusedTile !== 'custom') {
+      const element = document.querySelector(`[data-tile-id="${focusedTile.row}-${focusedTile.col}"]`)
+      if (element) {
+        element.scrollIntoView({ behavior: 'smooth', block: 'nearest' })
+      }
+    }
+  }, [focusedTile])
+
   return (
     <div className="w-screen h-screen flex flex-col bg-black overflow-hidden">
+      {showWarning && <AudioContextWarning onDismiss={handleDismissWarning} />}
+      {showHelp && <HelpModal onClose={() => setShowHelp(false)} />}
       <header className="bg-black border-b-2 border-white px-6 py-3">
-        <div className="flex items-center justify-between mb-3">
-          <h1 className="font-mono text-sm tracking-[0.3em] text-white">BRUITISTE</h1>
-          <div className="flex gap-4">
+        <div className="flex items-center justify-between gap-6">
+          <h1
+            onClick={() => setShowHelp(true)}
+            className="font-mono text-sm tracking-[0.3em] text-white flex-shrink-0 cursor-pointer hover:opacity-70 transition-opacity"
+          >
+            BRUITISTE
+          </h1>
+          <EngineControls
+            values={engineValues}
+            onChange={handleEngineChange}
+            onMapClick={handleParameterMapClick}
+            getMappedLFOs={getMappedLFOs}
+          />
+          <div className="flex gap-4 flex-shrink-0">
+            <button
+              onClick={handleStop}
+              disabled={!playing}
+              className="px-6 py-2 bg-black text-white border-2 border-white font-mono text-[11px] tracking-[0.2em] hover:bg-white hover:text-black transition-all disabled:opacity-30 disabled:cursor-not-allowed flex items-center gap-2"
+            >
+              <Square size={14} strokeWidth={2} fill="currentColor" />
+              STOP
+            </button>
             <button
               onClick={handleRandom}
-              className="px-6 py-2 bg-white text-black font-mono text-[11px] tracking-[0.2em] hover:bg-black hover:text-white border-2 border-white transition-all"
+              className="px-6 py-2 bg-white text-black font-mono text-[11px] tracking-[0.2em] hover:bg-black hover:text-white border-2 border-white transition-all flex items-center gap-2"
             >
+              <Dices size={14} strokeWidth={2} />
               RANDOM
             </button>
+            <button
+              onClick={handleRandomizeAllParams}
+              className="px-6 py-2 bg-white text-black font-mono text-[11px] tracking-[0.2em] hover:bg-black hover:text-white border-2 border-white transition-all flex items-center gap-2"
+            >
+              <Sparkles size={14} strokeWidth={2} />
+              CHAOS
+            </button>
             <button
               onClick={handleDownloadAll}
               disabled={downloading}
-              className="px-6 py-2 bg-black text-white border-2 border-white font-mono text-[11px] tracking-[0.2em] hover:bg-white hover:text-black transition-all disabled:opacity-30 disabled:cursor-not-allowed"
+              className="px-6 py-2 bg-black text-white border-2 border-white font-mono text-[11px] tracking-[0.2em] hover:bg-white hover:text-black transition-all disabled:opacity-30 disabled:cursor-not-allowed flex items-center gap-2"
             >
-              {downloading ? 'DOWNLOADING...' : 'DOWNLOAD ALL'}
+              <Archive size={14} strokeWidth={2} />
+              {downloading ? 'DOWNLOADING...' : 'PACK'}
             </button>
           </div>
         </div>
-        <EngineControls values={engineValues} onChange={handleEngineChange} />
       </header>
 
-      <div className="flex-1 grid grid-cols-2 auto-rows-min gap-[1px] bg-white p-[1px] overflow-auto">
-        {formulas.map((row, i) =>
-          row.map((formula, j) => {
-            const id = `${i}-${j}`
+      <LFOPanel onChange={handleLFOChange} onUpdateDepth={handleUpdateMappingDepth} onRemoveMapping={handleRemoveMapping} />
+
+      <div className="flex-1 flex flex-col overflow-auto bg-white">
+        <div className="grid grid-cols-4 gap-[1px] bg-white p-[1px]">
+          <div className="col-span-4">
+            <FormulaEditor
+              formula={customTile.formula}
+              isPlaying={playing === PLAYBACK_ID.CUSTOM}
+              isFocused={focusedTile === 'custom'}
+              playbackPosition={playing === PLAYBACK_ID.CUSTOM ? playbackPosition : 0}
+              onEvaluate={handleCustomEvaluate}
+              onStop={handleCustomStop}
+              onRandom={handleCustomRandom}
+            />
+          </div>
+        </div>
+
+        <div className="flex-1 grid grid-cols-4 auto-rows-min gap-[1px] bg-white p-[1px]">
+          {tiles.map((row, i) =>
+            row.map((tile, j) => {
+              const id = getTileId(i, j)
               return (
                 <BytebeatTile
                   key={id}
-                formula={formula}
+                  formula={tile.formula}
                   row={i}
                   col={j}
                   isPlaying={playing === id}
                   isQueued={queued === id}
-                isRegenerating={regenerating === id}
+                  isFocused={focusedTile !== 'custom' && focusedTile.row === i && focusedTile.col === j}
                   playbackPosition={playing === id ? playbackPosition : 0}
+                  a={tile.engineParams.a ?? 8}
+                  b={tile.engineParams.b ?? 16}
+                  c={tile.engineParams.c ?? 32}
+                  d={tile.engineParams.d ?? 64}
                   onPlay={handleTileClick}
                   onDoubleClick={handleTileDoubleClick}
                   onDownload={handleDownloadFormula}
@@ -215,8 +634,14 @@ function App() {
             })
           )}
         </div>
+      </div>
 
-      <EffectsBar values={effectValues} onChange={handleEffectChange} />
+      <EffectsBar
+        values={effectValues}
+        onChange={handleEffectChange}
+        onMapClick={handleParameterMapClick}
+        getMappedLFOs={getMappedLFOs}
+      />
     </div>
   )
 }

src/components/AudioContextWarning.tsx

@@ -0,0 +1,9 @@
+import { HelpModal } from './HelpModal'
+
+interface AudioContextWarningProps {
+  onDismiss: () => void
+}
+
+export function AudioContextWarning({ onDismiss }: AudioContextWarningProps) {
+  return <HelpModal onClose={onDismiss} showStartButton />
+}

src/components/BytebeatTile.tsx

@@ -1,5 +1,5 @@
 import { useRef, useEffect } from 'react'
-import { Download, RefreshCw } from 'lucide-react'
+import { Download, Dices } from 'lucide-react'
 import { generateWaveformData, drawWaveform } from '../utils/waveformGenerator'
 
 interface BytebeatTileProps {
@@ -8,15 +8,19 @@ interface BytebeatTileProps {
   col: number
   isPlaying: boolean
   isQueued: boolean
-  isRegenerating: boolean
+  isFocused: boolean
   playbackPosition: number
+  a: number
+  b: number
+  c: number
+  d: number
   onPlay: (formula: string, row: number, col: number) => void
   onDoubleClick: (formula: string, row: number, col: number) => void
   onDownload: (formula: string, filename: string) => void
   onRegenerate: (row: number, col: number) => void
 }
 
-export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegenerating, playbackPosition, onPlay, onDoubleClick, onDownload, onRegenerate }: BytebeatTileProps) {
+export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isFocused, playbackPosition, a, b, c, d, onPlay, onDoubleClick, onDownload, onRegenerate }: BytebeatTileProps) {
   const canvasRef = useRef<HTMLCanvasElement>(null)
 
   useEffect(() => {
@@ -27,10 +31,10 @@ export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegener
     canvas.width = rect.width * window.devicePixelRatio
     canvas.height = rect.height * window.devicePixelRatio
 
-    const waveformData = generateWaveformData(formula, canvas.width)
+    const waveformData = generateWaveformData(formula, canvas.width, 8000, 0.5, a, b, c, d)
     const color = isPlaying ? 'rgba(0, 0, 0, 0.3)' : 'rgba(255, 255, 255, 0.35)'
     drawWaveform(canvas, waveformData, color)
-  }, [formula, isPlaying, isQueued])
+  }, [formula, isPlaying, isQueued, a, b, c, d])
 
   const handleDownload = (e: React.MouseEvent) => {
     e.stopPropagation()
@@ -44,11 +48,12 @@ export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegener
 
   return (
     <div
+      data-tile-id={`${row}-${col}`}
       onClick={() => onPlay(formula, row, col)}
       onDoubleClick={() => onDoubleClick(formula, row, col)}
-      className={`relative hover:scale-[0.98] transition-all duration-150 font-mono p-3 flex items-center justify-between gap-3 cursor-pointer overflow-hidden ${
-        isPlaying ? 'bg-white text-black' : isQueued ? 'bg-black text-white animate-pulse' : isRegenerating ? 'bg-black text-white border-2 border-white' : 'bg-black text-white'
-      }`}
+      className={`relative hover:scale-[0.98] transition-all duration-150 font-mono p-3 flex items-center justify-between gap-1 cursor-pointer overflow-hidden ${
+        isPlaying ? 'bg-white text-black' : isQueued ? 'bg-black text-white animate-pulse' : 'bg-black text-white'
+      } ${isFocused ? 'outline outline-2 outline-white outline-offset-[-4px]' : ''}`}
     >
       <canvas
         ref={canvasRef}
@@ -63,7 +68,7 @@ export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegener
       <div className="text-xs break-all font-light flex-1 relative z-10">
         {formula}
       </div>
-      <div className="flex gap-2 flex-shrink-0 relative z-10">
+      <div className="flex gap-1 flex-shrink-0 relative z-10">
         <div
           onClick={handleRegenerate}
           className={`p-2 border transition-all duration-150 cursor-pointer hover:scale-105 ${
@@ -72,7 +77,7 @@ export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegener
               : 'bg-white text-black border-white'
           }`}
         >
-          <RefreshCw size={14} strokeWidth={2} className={isRegenerating ? 'animate-spin' : ''} />
+          <Dices size={14} strokeWidth={2} />
         </div>
         <div
           onClick={handleDownload}

src/components/Dropdown.tsx

@@ -0,0 +1,27 @@
+interface DropdownProps {
+  label: string
+  value: string
+  options: { value: string; label: string }[]
+  onChange: (value: string) => void
+}
+
+export function Dropdown({ label, value, options, onChange }: DropdownProps) {
+  return (
+    <div className="flex flex-col gap-1">
+      <label className="font-mono text-[9px] tracking-[0.15em] text-white">
+        {label.toUpperCase()}
+      </label>
+      <select
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        className="bg-black text-white border-2 border-white font-mono text-[10px] tracking-[0.1em] px-2 py-1 cursor-pointer hover:bg-white hover:text-black transition-colors"
+      >
+        {options.map((option) => (
+          <option key={option.value} value={option.value}>
+            {option.label.toUpperCase()}
+          </option>
+        ))}
+      </select>
+    </div>
+  )
+}

src/components/EffectsBar.tsx

@@ -1,103 +1,75 @@
+import { Dices } from 'lucide-react'
 import { Slider } from './Slider'
 import { Switch } from './Switch'
+import { Dropdown } from './Dropdown'
 import { EFFECTS } from '../config/effects'
-import { getClipModeLabel } from '../utils/formatters'
 import type { EffectValues } from '../types/effects'
 
 interface EffectsBarProps {
   values: EffectValues
-  onChange: (parameterId: string, value: number | boolean) => void
+  onChange: (parameterId: string, value: number | boolean | string) => void
+  onMapClick?: (paramId: string, lfoIndex: number) => void
+  getMappedLFOs?: (paramId: string) => number[]
 }
 
-export function EffectsBar({ values, onChange }: EffectsBarProps) {
-  const formatValue = (id: string, value: number): string => {
-    if (id === 'clipMode') {
-      return getClipModeLabel(value)
+export function EffectsBar({ values, onChange, onMapClick, getMappedLFOs }: EffectsBarProps) {
+  const randomizeEffect = (effect: typeof EFFECTS[number]) => {
+    effect.parameters.forEach(param => {
+      if (param.id.endsWith('Enable')) return
+
+      if (param.options) {
+        const randomOption = param.options[Math.floor(Math.random() * param.options.length)]
+        onChange(param.id, randomOption.value)
+      } else {
+        const range = param.max - param.min
+        const steps = Math.floor(range / param.step)
+        const randomStep = Math.floor(Math.random() * (steps + 1))
+        const randomValue = param.min + (randomStep * param.step)
+        onChange(param.id, randomValue)
       }
-    return value.toString()
-  }
-
-  const renderFilterEffect = (effect: typeof EFFECTS[number]) => {
-    const filterGroups = [
-      { prefix: 'hp', label: 'HP' },
-      { prefix: 'lp', label: 'LP' },
-      { prefix: 'bp', label: 'BP' }
-    ]
-
-    return (
-      <div key={effect.id} className="border-2 border-white p-3">
-        <h3 className="font-mono text-[10px] tracking-[0.2em] text-white mb-3">
-          {effect.name.toUpperCase()}
-        </h3>
-        <div className="flex flex-col gap-3">
-          {filterGroups.map(group => {
-            const enableParam = effect.parameters.find(p => p.id === `${group.prefix}Enable`)
-            const freqParam = effect.parameters.find(p => p.id === `${group.prefix}Freq`)
-            const resParam = effect.parameters.find(p => p.id === `${group.prefix}Res`)
-
-            if (!enableParam || !freqParam || !resParam) return null
-
-            return (
-              <div key={group.prefix} className="flex gap-2 items-center">
-                <Switch
-                  checked={Boolean(values[enableParam.id])}
-                  onChange={(checked) => onChange(enableParam.id, checked ? 1 : 0)}
-                  vertical
-                />
-                <div className="flex-1 flex flex-col gap-2">
-                  <Slider
-                    label={freqParam.label}
-                    value={values[freqParam.id] as number ?? freqParam.default}
-                    min={freqParam.min}
-                    max={freqParam.max}
-                    step={freqParam.step}
-                    unit={freqParam.unit}
-                    onChange={(value) => onChange(freqParam.id, value)}
-                    valueId={freqParam.id}
-                  />
-                  <Slider
-                    label={resParam.label}
-                    value={values[resParam.id] as number ?? resParam.default}
-                    min={resParam.min}
-                    max={resParam.max}
-                    step={resParam.step}
-                    unit={resParam.unit}
-                    onChange={(value) => onChange(resParam.id, value)}
-                    valueId={resParam.id}
-                  />
-                </div>
-              </div>
-            )
-          })}
-        </div>
-      </div>
-    )
+    })
   }
 
   return (
     <div className="bg-black border-t-2 border-white px-6 py-4">
       <div className="grid grid-cols-4 gap-4">
         {EFFECTS.map(effect => {
-          if (effect.id === 'filter') {
-            return renderFilterEffect(effect)
-          }
-
           return (
             <div key={effect.id} className="border-2 border-white p-3">
               <div className="flex items-center justify-between mb-3">
+                <div className="flex items-center gap-2">
                   <h3 className="font-mono text-[10px] tracking-[0.2em] text-white">
                     {effect.name.toUpperCase()}
                   </h3>
+                  <button
+                    onClick={() => randomizeEffect(effect)}
+                    className="p-1 text-white hover:bg-white hover:text-black transition-colors"
+                  >
+                    <Dices size={12} strokeWidth={2} />
+                  </button>
+                </div>
                 {effect.bypassable && (
                   <Switch
-                    checked={!Boolean(values[`${effect.id}Bypass`])}
+                    checked={!values[`${effect.id}Bypass`]}
                     onChange={(checked) => onChange(`${effect.id}Bypass`, !checked)}
-                    label={Boolean(values[`${effect.id}Bypass`]) ? 'OFF' : 'ON'}
+                    label={values[`${effect.id}Bypass`] ? 'OFF' : 'ON'}
                   />
                 )}
               </div>
               <div className="flex flex-col gap-3">
                 {effect.parameters.map(param => {
+                  if (param.options) {
+                    return (
+                      <Dropdown
+                        key={param.id}
+                        label={param.label}
+                        value={values[param.id] as string ?? param.default as string}
+                        options={param.options}
+                        onChange={(value) => onChange(param.id, value)}
+                      />
+                    )
+                  }
+
                   const isSwitch = param.min === 0 && param.max === 1 && param.step === 1
 
                   if (isSwitch) {
@@ -110,7 +82,7 @@ export function EffectsBar({ values, onChange }: EffectsBarProps) {
                           <Switch
                             checked={Boolean(values[param.id])}
                             onChange={(checked) => onChange(param.id, checked ? 1 : 0)}
-                            label={Boolean(values[param.id]) ? 'ON' : 'OFF'}
+                            label={values[param.id] ? 'ON' : 'OFF'}
                           />
                         </div>
                       </div>
@@ -121,14 +93,16 @@ export function EffectsBar({ values, onChange }: EffectsBarProps) {
                     <Slider
                       key={param.id}
                       label={param.label}
-                      value={values[param.id] as number ?? param.default}
+                      value={values[param.id] as number ?? param.default as number}
                       min={param.min}
                       max={param.max}
                       step={param.step}
                       unit={param.unit}
                       onChange={(value) => onChange(param.id, value)}
-                      formatValue={param.id === 'clipMode' ? formatValue : undefined}
                       valueId={param.id}
+                      paramId={param.id}
+                      onMapClick={onMapClick}
+                      mappedLFOs={getMappedLFOs ? getMappedLFOs(param.id) : []}
                     />
                   )
                 })}

src/components/EngineControls.tsx

@@ -1,13 +1,18 @@
 import { ENGINE_CONTROLS } from '../config/effects'
 import { getComplexityLabel, getBitDepthLabel, getSampleRateLabel } from '../utils/formatters'
 import type { EffectValues } from '../types/effects'
+import { Knob } from './Knob'
 
 interface EngineControlsProps {
   values: EffectValues
   onChange: (parameterId: string, value: number) => void
+  onMapClick?: (paramId: string, lfoIndex: number) => void
+  getMappedLFOs?: (paramId: string) => number[]
 }
 
-export function EngineControls({ values, onChange }: EngineControlsProps) {
+const KNOB_PARAMS = ['masterVolume', 'pitch', 'a', 'b', 'c', 'd']
+
+export function EngineControls({ values, onChange, onMapClick, getMappedLFOs }: EngineControlsProps) {
   const formatValue = (id: string, value: number): string => {
     switch (id) {
       case 'sampleRate':
@@ -16,15 +21,39 @@ export function EngineControls({ values, onChange }: EngineControlsProps) {
         return getComplexityLabel(value)
       case 'bitDepth':
         return getBitDepthLabel(value)
-      default:
+      default: {
         const param = ENGINE_CONTROLS[0].parameters.find(p => p.id === id)
         return `${value}${param?.unit || ''}`
       }
     }
+  }
 
   return (
     <div className="flex items-center gap-6">
-      {ENGINE_CONTROLS[0].parameters.map(param => (
+      {ENGINE_CONTROLS[0].parameters.map(param => {
+        const useKnob = KNOB_PARAMS.includes(param.id)
+
+        if (useKnob) {
+          return (
+            <Knob
+              key={param.id}
+              label={param.label}
+              value={(values[param.id] as number) ?? param.default}
+              min={param.min as number}
+              max={param.max as number}
+              step={param.step as number}
+              unit={param.unit}
+              onChange={(value) => onChange(param.id, value)}
+              formatValue={formatValue}
+              valueId={param.id}
+              paramId={param.id}
+              onMapClick={onMapClick}
+              mappedLFOs={getMappedLFOs ? getMappedLFOs(param.id) : []}
+            />
+          )
+        }
+
+        return (
           <div key={param.id} className="flex flex-col gap-1 min-w-[100px]">
             <div className="flex justify-between items-baseline">
               <label className="font-mono text-[9px] tracking-[0.15em] text-white">
@@ -44,7 +73,8 @@ export function EngineControls({ values, onChange }: EngineControlsProps) {
               className="w-full h-[2px] bg-white appearance-none cursor-pointer"
             />
           </div>
-      ))}
+        )
+      })}
     </div>
   )
 }

src/components/FormulaEditor.tsx

@@ -0,0 +1,100 @@
+import { useState, useEffect } from 'react'
+import { Play, Square, Dices } from 'lucide-react'
+
+interface FormulaEditorProps {
+  formula: string
+  isPlaying: boolean
+  isFocused: boolean
+  playbackPosition: number
+  onEvaluate: (formula: string) => void
+  onStop: () => void
+  onRandom: () => string
+}
+
+export function FormulaEditor({ formula: externalFormula, isPlaying, isFocused, playbackPosition, onEvaluate, onStop, onRandom }: FormulaEditorProps) {
+  const [formula, setFormula] = useState(externalFormula)
+
+  useEffect(() => {
+    setFormula(externalFormula)
+  }, [externalFormula])
+
+  const handleEvaluate = () => {
+    if (formula.trim()) {
+      onEvaluate(formula)
+    }
+  }
+
+  const handleRandom = () => {
+    const newFormula = onRandom()
+    setFormula(newFormula)
+    onEvaluate(newFormula)
+  }
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter') {
+      if (e.ctrlKey) {
+        e.preventDefault()
+        handleEvaluate()
+      } else {
+        e.preventDefault()
+      }
+    }
+  }
+
+  return (
+    <div
+      className={`relative font-mono p-3 flex items-center gap-3 transition-all duration-150 ${
+        isPlaying ? 'bg-white text-black' : 'bg-black text-white'
+      } ${isFocused ? 'ring-2 ring-white ring-inset' : ''}`}
+    >
+      {isPlaying && (
+        <div
+          className="absolute left-0 top-0 bottom-0 bg-black opacity-10 transition-all duration-75 ease-linear"
+          style={{ width: `${playbackPosition * 100}%` }}
+        />
+      )}
+      <input
+        type="text"
+        value={formula}
+        onChange={(e) => setFormula(e.target.value)}
+        onKeyDown={handleKeyDown}
+        placeholder="Enter bytebeat formula..."
+        className={`flex-1 bg-transparent border-none outline-none font-mono text-xs relative z-10 ${
+          isPlaying ? 'text-black placeholder:text-black/50' : 'text-white placeholder:text-white/50'
+        }`}
+      />
+      <div className="flex gap-2 relative z-10">
+        <button
+          onClick={handleRandom}
+          className={`p-2 border transition-all duration-150 cursor-pointer hover:scale-105 ${
+            isPlaying
+              ? 'bg-black text-white border-black'
+              : 'bg-white text-black border-white'
+          }`}
+        >
+          <Dices size={14} strokeWidth={2} />
+        </button>
+        {isPlaying && (
+          <button
+            onClick={onStop}
+            className="px-4 py-2 border transition-all duration-150 cursor-pointer hover:scale-105 flex items-center gap-2 font-mono text-[10px] tracking-[0.2em] flex-shrink-0 bg-black text-white border-black"
+          >
+            <Square size={12} strokeWidth={2} fill="currentColor" />
+            STOP
+          </button>
+        )}
+        <button
+          onClick={handleEvaluate}
+          className={`px-4 py-2 border transition-all duration-150 cursor-pointer hover:scale-105 flex items-center gap-2 font-mono text-[10px] tracking-[0.2em] flex-shrink-0 ${
+            isPlaying
+              ? 'bg-black text-white border-black'
+              : 'bg-white text-black border-white'
+          }`}
+        >
+          <Play size={12} strokeWidth={2} fill="currentColor" />
+          EVAL
+        </button>
+      </div>
+    </div>
+  )
+}

src/components/HelpModal.tsx

@@ -0,0 +1,105 @@
+interface HelpModalProps {
+  onClose: () => void
+  showStartButton?: boolean
+}
+
+export function HelpModal({ onClose, showStartButton = false }: HelpModalProps) {
+  return (
+    <div
+      className="fixed inset-0 bg-black/70 flex items-center justify-center z-50"
+      onClick={onClose}
+      onKeyDown={(e) => {
+        if (e.key === 'Escape' || e.key === 'Enter' || e.key === ' ') {
+          onClose()
+        }
+      }}
+      tabIndex={0}
+    >
+      <div
+        className="border-4 border-white bg-black p-12 max-w-4xl w-full mx-8"
+        onClick={(e) => e.stopPropagation()}
+      >
+        <h1 className="font-mono text-2xl tracking-[0.3em] text-white mb-6 text-center">
+          BRUITISTE
+        </h1>
+        <p className="font-mono text-sm text-white mb-2 leading-relaxed text-center">
+          Harsh noise soundbox made as a love statement to all weird noises, hums, audio glitches and ominous textures. Be careful, lower your volume! Tweak some parameters!
+        </p>
+        <p className="font-mono text-xs text-white mb-6 opacity-70 text-center">
+          Made by Raphaël Forment (BuboBubo) — <a href="https://raphaelforment.fr" target="_blank" rel="noopener noreferrer" className="underline hover:opacity-100">raphaelforment.fr</a>
+        </p>
+
+        <div className="font-mono text-sm text-white mb-8">
+          <h2 className="text-lg tracking-[0.2em] mb-4">KEYBOARD SHORTCUTS</h2>
+
+          <table className="w-full border-2 border-white">
+            <thead>
+              <tr className="border-b-2 border-white">
+                <th className="text-left p-3 bg-white text-black tracking-[0.1em]">KEY</th>
+                <th className="text-left p-3 bg-white text-black tracking-[0.1em]">ACTION</th>
+              </tr>
+            </thead>
+            <tbody>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">SPACE</td>
+                <td className="p-3">Play/Stop current tile</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">ARROWS</td>
+                <td className="p-3">Navigate tiles</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">SHIFT + ARROWS</td>
+                <td className="p-3">Jump 10 tiles</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">ENTER</td>
+                <td className="p-3">Queue tile (play after current)</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">DOUBLE ENTER</td>
+                <td className="p-3">Play immediately</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">R</td>
+                <td className="p-3">Regenerate current tile</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">SHIFT + R</td>
+                <td className="p-3">Randomize all tiles</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">C</td>
+                <td className="p-3">Randomize current tile params</td>
+              </tr>
+              <tr className="border-b border-white">
+                <td className="p-3 border-r border-white">SHIFT + C</td>
+                <td className="p-3">Randomize all params (CHAOS)</td>
+              </tr>
+              <tr>
+                <td className="p-3 border-r border-white">ESC</td>
+                <td className="p-3">Exit mapping mode</td>
+              </tr>
+            </tbody>
+          </table>
+        </div>
+
+        {showStartButton ? (
+          <button
+            onClick={onClose}
+            className="w-full px-8 py-4 bg-white text-black font-mono text-sm tracking-[0.2em] hover:bg-black hover:text-white border-2 border-white transition-all"
+          >
+            START
+          </button>
+        ) : (
+          <button
+            onClick={onClose}
+            className="w-full px-8 py-4 bg-white text-black font-mono text-sm tracking-[0.2em] hover:bg-black hover:text-white border-2 border-white transition-all"
+          >
+            CLOSE
+          </button>
+        )}
+      </div>
+    </div>
+  )
+}

src/components/Knob.tsx

@@ -0,0 +1,145 @@
+import { useRef, useState, useEffect, useCallback } from 'react'
+import { useStore } from '@nanostores/react'
+import { mappingMode } from '../stores/mappingMode'
+
+interface KnobProps {
+  label: string
+  value: number
+  min: number
+  max: number
+  step: number
+  unit?: string
+  onChange: (value: number) => void
+  formatValue?: (id: string, value: number) => string
+  valueId?: string
+  size?: number
+  paramId?: string
+  onMapClick?: (paramId: string, activeLFO: number) => void
+  mappedLFOs?: number[]
+}
+
+export function Knob({
+  label,
+  value,
+  min,
+  max,
+  step,
+  unit,
+  onChange,
+  formatValue,
+  valueId,
+  size = 48,
+  paramId,
+  onMapClick,
+  mappedLFOs = []
+}: KnobProps) {
+  const [isDragging, setIsDragging] = useState(false)
+  const startYRef = useRef<number>(0)
+  const startValueRef = useRef<number>(0)
+  const mappingModeState = useStore(mappingMode)
+
+  const displayValue = formatValue && valueId ? formatValue(valueId, value) : `${value}${unit || ''}`
+  const isInMappingMode = mappingModeState.isActive && paramId
+  const hasMappings = mappedLFOs.length > 0
+
+  const normalizedValue = (value - min) / (max - min)
+  const angle = -225 + normalizedValue * 270
+
+  const handleMouseDown = (e: React.MouseEvent) => {
+    if (isInMappingMode && paramId && mappingModeState.activeLFO !== null && onMapClick) {
+      onMapClick(paramId, mappingModeState.activeLFO)
+      e.preventDefault()
+      return
+    }
+
+    setIsDragging(true)
+    startYRef.current = e.clientY
+    startValueRef.current = value
+    e.preventDefault()
+  }
+
+  const handleMouseMove = useCallback((e: MouseEvent) => {
+    if (!isDragging) return
+
+    const deltaY = startYRef.current - e.clientY
+    const range = max - min
+    const sensitivity = range / 200
+    const newValue = Math.max(min, Math.min(max, startValueRef.current + deltaY * sensitivity))
+
+    const steppedValue = Math.round(newValue / step) * step
+    onChange(steppedValue)
+  }, [isDragging, max, min, step, onChange])
+
+  const handleMouseUp = useCallback(() => {
+    setIsDragging(false)
+  }, [])
+
+  useEffect(() => {
+    if (isDragging) {
+      window.addEventListener('mousemove', handleMouseMove)
+      window.addEventListener('mouseup', handleMouseUp)
+      return () => {
+        window.removeEventListener('mousemove', handleMouseMove)
+        window.removeEventListener('mouseup', handleMouseUp)
+      }
+    }
+  }, [isDragging, handleMouseMove, handleMouseUp])
+
+  return (
+    <div className="relative flex flex-col items-center">
+      <div
+        className={`relative select-none ${isInMappingMode ? 'cursor-pointer' : 'cursor-ns-resize'}`}
+        onMouseDown={handleMouseDown}
+        style={{ width: size, height: size }}
+      >
+        <svg
+          width={size}
+          height={size}
+          viewBox={`0 0 ${size} ${size}`}
+        >
+          <circle
+            cx={size / 2}
+            cy={size / 2}
+            r={(size - 4) / 2}
+            fill="none"
+            stroke="white"
+            strokeWidth="2"
+            className={isInMappingMode ? 'animate-pulse' : ''}
+          />
+
+          <circle
+            cx={size / 2}
+            cy={size / 2}
+            r={(size - 8) / 2}
+            fill="black"
+          />
+
+          <line
+            x1={size / 2 + Math.cos((angle * Math.PI) / 180) * ((size - 16) / 2)}
+            y1={size / 2 + Math.sin((angle * Math.PI) / 180) * ((size - 16) / 2)}
+            x2={size / 2 + Math.cos((angle * Math.PI) / 180) * ((size - 4) / 2)}
+            y2={size / 2 + Math.sin((angle * Math.PI) / 180) * ((size - 4) / 2)}
+            stroke="white"
+            strokeWidth="2"
+            strokeLinecap="square"
+          />
+
+          {hasMappings && (
+            <circle
+              cx={size / 2}
+              cy={8}
+              r={2}
+              fill="white"
+            />
+          )}
+        </svg>
+
+        <div className="absolute inset-0 flex items-center justify-center pointer-events-none">
+          <span className={`font-mono text-[9px] tracking-[0.15em] text-white ${isInMappingMode ? 'animate-pulse' : ''}`}>
+            {isDragging ? displayValue : label.toUpperCase()}
+          </span>
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/LFOPanel.tsx

@@ -0,0 +1,61 @@
+import { useStore } from '@nanostores/react'
+import { lfoSettings } from '../stores/settings'
+import { toggleMappingMode } from '../stores/mappingMode'
+import { LFOScope } from './LFOScope'
+import type { LFOConfig } from '../stores/settings'
+import type { LFOWaveform } from '../domain/modulation/LFO'
+
+interface LFOPanelProps {
+  onChange: (lfoIndex: number, config: LFOConfig) => void
+  onUpdateDepth: (lfoIndex: number, paramId: string, depth: number) => void
+  onRemoveMapping: (lfoIndex: number, paramId: string) => void
+}
+
+type LFOKey = 'lfo1' | 'lfo2' | 'lfo3' | 'lfo4'
+
+export function LFOPanel({ onChange, onUpdateDepth, onRemoveMapping }: LFOPanelProps) {
+  const lfoValues = useStore(lfoSettings)
+
+  const handleLFOChange = (lfoKey: LFOKey, lfoIndex: number, frequency: number, phase: number, waveform: LFOWaveform) => {
+    const lfo = lfoValues[lfoKey]
+    const updated = { ...lfo, frequency, phase, waveform }
+    lfoSettings.setKey(lfoKey, updated)
+    onChange(lfoIndex, updated)
+  }
+
+  const handleMapClick = (_lfoKey: LFOKey, lfoIndex: number) => {
+    toggleMappingMode(lfoIndex)
+  }
+
+  const lfoConfigs: Array<{ key: LFOKey; index: number }> = [
+    { key: 'lfo1', index: 0 },
+    { key: 'lfo2', index: 1 },
+    { key: 'lfo3', index: 2 },
+    { key: 'lfo4', index: 3 }
+  ]
+
+  return (
+    <div className="bg-black border-t-2 border-white">
+      <div className="grid grid-cols-4 divide-x-2 divide-white">
+        {lfoConfigs.map(({ key, index }) => {
+          const lfo = lfoValues[key]
+          return (
+            <div key={key} className="px-2 py-3 flex items-center">
+              <LFOScope
+                lfoIndex={index}
+                waveform={lfo.waveform}
+                frequency={lfo.frequency}
+                phase={lfo.phase}
+                mappings={lfo.mappings}
+                onChange={(freq, phase, waveform) => handleLFOChange(key, index, freq, phase, waveform)}
+                onMapClick={() => handleMapClick(key, index)}
+                onUpdateDepth={(paramId, depth) => onUpdateDepth(index, paramId, depth)}
+                onRemoveMapping={(paramId) => onRemoveMapping(index, paramId)}
+              />
+            </div>
+          )
+        })}
+      </div>
+    </div>
+  )
+}

src/components/LFOScope.tsx

@@ -0,0 +1,238 @@
+import { useEffect, useRef, useState, useCallback } from 'react'
+import { useStore } from '@nanostores/react'
+import { LFO, type LFOWaveform } from '../domain/modulation/LFO'
+import { mappingMode } from '../stores/mappingMode'
+import { parameterRegistry } from '../domain/modulation/ParameterRegistry'
+import { MappingEditor } from './MappingEditor'
+
+interface LFOScopeProps {
+  lfoIndex: number
+  waveform: LFOWaveform
+  frequency: number
+  phase: number
+  mappings: Array<{ targetParam: string; depth: number }>
+  onChange: (frequency: number, phase: number, waveform: LFOWaveform) => void
+  onMapClick: () => void
+  onUpdateDepth: (paramId: string, depth: number) => void
+  onRemoveMapping: (paramId: string) => void
+}
+
+const WAVEFORMS: LFOWaveform[] = ['sine', 'triangle', 'square', 'sawtooth', 'random']
+
+const CANVAS_WIDTH = 340
+const CANVAS_HEIGHT = 60
+const MIN_FREQ = 0.01
+const MAX_FREQ = 20
+
+export function LFOScope({ lfoIndex, waveform, frequency, phase, mappings, onChange, onMapClick, onUpdateDepth, onRemoveMapping }: LFOScopeProps) {
+  const canvasRef = useRef<HTMLCanvasElement>(null)
+  const lfoRef = useRef<LFO | null>(null)
+  const animationRef = useRef<number | null>(null)
+  const [isDragging, setIsDragging] = useState(false)
+  const [showMappings, setShowMappings] = useState(false)
+  const [showEditor, setShowEditor] = useState(false)
+  const dragStartRef = useRef<{ x: number; y: number; freq: number; phase: number; moved: boolean } | null>(null)
+  const mappingModeState = useStore(mappingMode)
+
+  const getLFOValueAtPhase = useCallback((phaseVal: number): number => {
+    const normalizedPhase = phaseVal % 1
+
+    switch (waveform) {
+      case 'sine':
+        return Math.sin(normalizedPhase * 2 * Math.PI)
+      case 'triangle':
+        return normalizedPhase < 0.5
+          ? -1 + 4 * normalizedPhase
+          : 3 - 4 * normalizedPhase
+      case 'square':
+        return normalizedPhase < 0.5 ? 1 : -1
+      case 'sawtooth':
+        return 2 * normalizedPhase - 1
+      case 'random':
+        return Math.sin(normalizedPhase * 2 * Math.PI)
+      default:
+        return 0
+    }
+  }, [waveform])
+
+  useEffect(() => {
+    if (!lfoRef.current) {
+      lfoRef.current = new LFO(new AudioContext(), frequency, phase, waveform)
+    } else {
+      lfoRef.current.setFrequency(frequency)
+      lfoRef.current.setPhase(phase)
+      lfoRef.current.setWaveform(waveform)
+    }
+  }, [frequency, phase, waveform])
+
+  useEffect(() => {
+    const canvas = canvasRef.current
+    if (!canvas) return
+
+    const ctx = canvas.getContext('2d')
+    if (!ctx) return
+
+    let time = 0
+
+    const render = () => {
+      if (!lfoRef.current) return
+
+      ctx.fillStyle = '#000000'
+      ctx.fillRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT)
+
+      ctx.strokeStyle = '#ffffff'
+      ctx.lineWidth = 2
+      ctx.beginPath()
+
+      const samples = CANVAS_WIDTH
+      const centerY = CANVAS_HEIGHT / 2
+
+      for (let x = 0; x < samples; x++) {
+        const t = (x / samples) + time
+        const phase = t % 1
+        const value = getLFOValueAtPhase(phase)
+        const y = centerY - (value * (centerY - 4))
+
+        if (x === 0) {
+          ctx.moveTo(x, y)
+        } else {
+          ctx.lineTo(x, y)
+        }
+      }
+
+      ctx.stroke()
+
+      ctx.fillStyle = '#ffffff'
+      ctx.font = '9px monospace'
+      ctx.textAlign = 'left'
+      ctx.fillText(`${frequency.toFixed(2)}Hz`, 4, 12)
+      ctx.fillText(`${phase.toFixed(0)}°`, 4, 24)
+
+      time += frequency * 0.016
+      animationRef.current = requestAnimationFrame(render)
+    }
+
+    render()
+
+    return () => {
+      if (animationRef.current) {
+        cancelAnimationFrame(animationRef.current)
+      }
+    }
+  }, [frequency, waveform, phase, getLFOValueAtPhase])
+
+  const handleMouseDown = (e: React.MouseEvent<HTMLCanvasElement>) => {
+    if (e.button === 2) return
+
+    setIsDragging(true)
+    dragStartRef.current = {
+      x: e.clientX,
+      y: e.clientY,
+      freq: frequency,
+      phase: phase,
+      moved: false
+    }
+  }
+
+  const handleMouseMove = (e: React.MouseEvent<HTMLCanvasElement>) => {
+    if (!isDragging || !dragStartRef.current) return
+
+    const deltaY = dragStartRef.current.y - e.clientY
+    const deltaX = e.clientX - dragStartRef.current.x
+
+    const distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY)
+    if (distance > 3) {
+      dragStartRef.current.moved = true
+    }
+
+    if (!dragStartRef.current.moved) return
+
+    const freqSensitivity = 0.05
+    let newFreq = dragStartRef.current.freq * Math.exp(deltaY * freqSensitivity)
+    newFreq = Math.max(MIN_FREQ, Math.min(MAX_FREQ, newFreq))
+
+    const phaseSensitivity = 2
+    let newPhase = (dragStartRef.current.phase + deltaX * phaseSensitivity) % 360
+    if (newPhase < 0) newPhase += 360
+
+    onChange(newFreq, newPhase, waveform)
+  }
+
+  const handleMouseUp = () => {
+    if (dragStartRef.current && !dragStartRef.current.moved) {
+      onMapClick()
+    }
+    setIsDragging(false)
+    dragStartRef.current = null
+  }
+
+  const handleContextMenu = (e: React.MouseEvent<HTMLCanvasElement>) => {
+    e.preventDefault()
+    setShowEditor(true)
+  }
+
+  const handleDoubleClick = () => {
+    const currentIndex = WAVEFORMS.indexOf(waveform)
+    const nextIndex = (currentIndex + 1) % WAVEFORMS.length
+    const nextWaveform = WAVEFORMS[nextIndex]
+    onChange(frequency, phase, nextWaveform)
+  }
+
+  const isActive = mappingModeState.isActive && mappingModeState.activeLFO === lfoIndex
+  const hasMappings = mappings.length > 0
+
+  return (
+    <div className="flex items-center gap-1 w-full relative">
+      <canvas
+        ref={canvasRef}
+        width={CANVAS_WIDTH}
+        height={CANVAS_HEIGHT}
+        className={`border-2 border-white cursor-move flex-1 ${
+          isActive ? 'animate-pulse' : ''
+        }`}
+        style={{ maxWidth: CANVAS_WIDTH }}
+        onMouseDown={handleMouseDown}
+        onMouseMove={handleMouseMove}
+        onMouseUp={handleMouseUp}
+        onMouseLeave={handleMouseUp}
+        onContextMenu={handleContextMenu}
+        onDoubleClick={handleDoubleClick}
+        onMouseEnter={() => setShowMappings(true)}
+        onMouseOut={() => setShowMappings(false)}
+      />
+
+      {isActive && (
+        <div className="absolute top-2 right-2 bg-black border border-white px-2 py-1 pointer-events-none">
+          <div className="font-mono text-[9px] text-white tracking-wider">
+            CLICK PARAM TO MAP | ESC TO EXIT
+          </div>
+        </div>
+      )}
+
+      {showMappings && hasMappings && (
+        <div className="absolute left-2 bottom-2 bg-black border border-white p-1 z-10 pointer-events-none">
+          <div className="font-mono text-[8px] text-white">
+            {mappings.map((m, i) => {
+              const meta = parameterRegistry.getMetadata(m.targetParam)
+              return (
+                <div key={i} className="whitespace-nowrap">
+                  {meta?.label ?? m.targetParam} ({m.depth}%)
+                </div>
+              )
+            })}
+          </div>
+        </div>
+      )}
+
+      {showEditor && (
+        <MappingEditor
+          lfoIndex={lfoIndex}
+          mappings={mappings}
+          onUpdateDepth={onUpdateDepth}
+          onRemoveMapping={onRemoveMapping}
+          onClose={() => setShowEditor(false)}
+        />
+      )}
+    </div>
+  )
+}

src/components/MappingEditor.tsx

@@ -0,0 +1,81 @@
+import { parameterRegistry } from '../domain/modulation/ParameterRegistry'
+
+interface Mapping {
+  targetParam: string
+  depth: number
+}
+
+interface MappingEditorProps {
+  lfoIndex: number
+  mappings: Mapping[]
+  onUpdateDepth: (paramId: string, depth: number) => void
+  onRemoveMapping: (paramId: string) => void
+  onClose: () => void
+}
+
+export function MappingEditor({ lfoIndex, mappings, onUpdateDepth, onRemoveMapping, onClose }: MappingEditorProps) {
+  return (
+    <>
+      <div className="fixed inset-0 z-50" onClick={onClose} />
+      <div className="fixed inset-0 pointer-events-none flex items-center justify-center z-50">
+        <div
+          className="bg-black border-2 border-white p-4 min-w-[300px] max-w-[400px] pointer-events-auto"
+          onClick={(e) => e.stopPropagation()}
+        >
+        <div className="flex justify-between items-center mb-4">
+          <h2 className="font-mono text-sm tracking-[0.15em] text-white">
+            LFO {lfoIndex + 1} MAPPINGS
+          </h2>
+          <button
+            onClick={onClose}
+            className="font-mono text-xs text-white hover:bg-white hover:text-black px-2 py-1 border-2 border-white"
+          >
+            ✕
+          </button>
+        </div>
+
+        {mappings.length === 0 ? (
+          <div className="font-mono text-xs text-white text-center py-4">
+            NO MAPPINGS
+          </div>
+        ) : (
+          <div className="space-y-3">
+            {mappings.map((mapping) => {
+              const meta = parameterRegistry.getMetadata(mapping.targetParam)
+              return (
+                <div key={mapping.targetParam} className="border-2 border-white p-2">
+                  <div className="flex justify-between items-center mb-2">
+                    <span className="font-mono text-xs text-white tracking-[0.1em]">
+                      {meta?.label ?? mapping.targetParam}
+                    </span>
+                    <button
+                      onClick={() => onRemoveMapping(mapping.targetParam)}
+                      className="font-mono text-[10px] text-white hover:bg-white hover:text-black px-1 border border-white"
+                    >
+                      REMOVE
+                    </button>
+                  </div>
+                  <div className="flex items-center gap-2">
+                    <input
+                      type="range"
+                      min="0"
+                      max="100"
+                      step="1"
+                      value={mapping.depth}
+                      onChange={(e) => onUpdateDepth(mapping.targetParam, Number(e.target.value))}
+                      className="flex-1 h-[2px] appearance-none cursor-pointer slider bg-white"
+                    />
+                    <span className="font-mono text-xs text-white w-12 text-right">
+                      {mapping.depth}%
+                    </span>
+                  </div>
+                </div>
+              )
+            })}
+          </div>
+        )}
+        </div>
+      </div>
+    </>
+  )
+}

src/components/Slider.tsx

@@ -1,3 +1,6 @@
+import { useStore } from '@nanostores/react'
+import { mappingMode } from '../stores/mappingMode'
+
 interface SliderProps {
   label: string
   value: number
@@ -8,16 +11,47 @@ interface SliderProps {
   onChange: (value: number) => void
   formatValue?: (id: string, value: number) => string
   valueId?: string
+  paramId?: string
+  onMapClick?: (paramId: string, activeLFO: number) => void
+  mappedLFOs?: number[]
 }
 
-export function Slider({ label, value, min, max, step, unit, onChange, formatValue, valueId }: SliderProps) {
+export function Slider({
+  label,
+  value,
+  min,
+  max,
+  step,
+  unit,
+  onChange,
+  formatValue,
+  valueId,
+  paramId,
+  onMapClick,
+  mappedLFOs = []
+}: SliderProps) {
+  const mappingModeState = useStore(mappingMode)
   const displayValue = formatValue && valueId ? formatValue(valueId, value) : `${value}${unit || ''}`
+  const isInMappingMode = !!(mappingModeState.isActive && paramId)
+  const hasMappings = mappedLFOs.length > 0
+
+  const handleClick = () => {
+    if (isInMappingMode && paramId && mappingModeState.activeLFO !== null && onMapClick) {
+      onMapClick(paramId, mappingModeState.activeLFO)
+    }
+  }
 
   return (
-    <div className="flex flex-col gap-2">
+    <div
+      className={`flex flex-col gap-2 ${isInMappingMode ? 'cursor-pointer' : ''}`}
+      onClick={handleClick}
+    >
       <div className="flex justify-between items-baseline">
-        <label className="font-mono text-[10px] tracking-[0.2em] text-white">
+        <label className={`font-mono text-[10px] tracking-[0.2em] ${
+          isInMappingMode ? 'text-white animate-pulse' : hasMappings ? 'text-white' : 'text-white'
+        }`}>
           {label.toUpperCase()}
+          {hasMappings && <span className="ml-1 text-[8px]">●</span>}
         </label>
         <span className="font-mono text-[10px] text-white">
           {displayValue}
@@ -30,7 +64,10 @@ export function Slider({ label, value, min, max, step, unit, onChange, formatVal
         step={step}
         value={value}
         onChange={(e) => onChange(Number(e.target.value))}
-        className="w-full h-[2px] bg-white appearance-none cursor-pointer slider"
+        className={`w-full h-[2px] appearance-none cursor-pointer slider ${
+          hasMappings ? 'bg-white opacity-80' : 'bg-white'
+        }`}
+        disabled={isInMappingMode}
       />
     </div>
   )

src/config/effects.ts

@@ -10,18 +10,18 @@ export const ENGINE_CONTROLS: EffectConfig[] = [
         label: 'Sample Rate',
         min: 0,
         max: 3,
-        default: 1,
+        default: 3,
         step: 1,
         unit: ''
       },
       {
-        id: 'loopDuration',
+        id: 'loopCount',
         label: 'Loop',
-        min: 2,
-        max: 8,
-        default: 4,
-        step: 2,
-        unit: 's'
+        min: 1,
+        max: 10,
+        default: 2,
+        step: 1,
+        unit: ''
       },
       {
         id: 'complexity',
@@ -37,13 +37,13 @@ export const ENGINE_CONTROLS: EffectConfig[] = [
         label: 'Bit Depth',
         min: 0,
         max: 2,
-        default: 0,
+        default: 2,
         step: 1,
         unit: ''
       },
       {
         id: 'masterVolume',
-        label: 'Volume',
+        label: 'Vol',
         min: 0,
         max: 100,
         default: 75,
@@ -53,11 +53,47 @@ export const ENGINE_CONTROLS: EffectConfig[] = [
       {
         id: 'pitch',
         label: 'Pitch',
-        min: 0.1,
+        min: 0.25,
         max: 4,
         default: 1,
         step: 0.01,
         unit: 'x'
+      },
+      {
+        id: 'a',
+        label: 'A',
+        min: 0,
+        max: 255,
+        default: 8,
+        step: 1,
+        unit: ''
+      },
+      {
+        id: 'b',
+        label: 'B',
+        min: 0,
+        max: 255,
+        default: 16,
+        step: 1,
+        unit: ''
+      },
+      {
+        id: 'c',
+        label: 'C',
+        min: 0,
+        max: 255,
+        default: 32,
+        step: 1,
+        unit: ''
+      },
+      {
+        id: 'd',
+        label: 'D',
+        min: 0,
+        max: 255,
+        default: 64,
+        step: 1,
+        unit: ''
       }
     ]
   }
@@ -67,85 +103,38 @@ export const EFFECTS: EffectConfig[] = [
   {
     id: 'filter',
     name: 'Filter',
+    bypassable: true,
     parameters: [
       {
-        id: 'hpEnable',
-        label: 'HP',
+        id: 'filterMode',
+        label: 'Mode',
         min: 0,
-        max: 1,
-        default: 0,
+        max: 0,
+        default: 'lowpass',
         step: 1,
-        unit: ''
+        unit: '',
+        options: [
+          { value: 'lowpass', label: 'LP' },
+          { value: 'highpass', label: 'HP' },
+          { value: 'bandpass', label: 'BP' },
+          { value: 'notch', label: 'Notch' }
+        ]
       },
       {
-        id: 'hpFreq',
-        label: 'HP Freq',
-        min: 20,
-        max: 10000,
-        default: 1000,
-        step: 10,
-        unit: 'Hz'
-      },
-      {
-        id: 'hpRes',
-        label: 'HP Q',
-        min: 0.1,
-        max: 20,
-        default: 1,
-        step: 0.1,
-        unit: ''
-      },
-      {
-        id: 'lpEnable',
-        label: 'LP',
-        min: 0,
-        max: 1,
-        default: 0,
-        step: 1,
-        unit: ''
-      },
-      {
-        id: 'lpFreq',
-        label: 'LP Freq',
+        id: 'filterFreq',
+        label: 'Freq',
         min: 20,
         max: 20000,
-        default: 5000,
-        step: 10,
-        unit: 'Hz'
-      },
-      {
-        id: 'lpRes',
-        label: 'LP Q',
-        min: 0.1,
-        max: 20,
-        default: 1,
-        step: 0.1,
-        unit: ''
-      },
-      {
-        id: 'bpEnable',
-        label: 'BP',
-        min: 0,
-        max: 1,
-        default: 0,
-        step: 1,
-        unit: ''
-      },
-      {
-        id: 'bpFreq',
-        label: 'BP Freq',
-        min: 20,
-        max: 10000,
         default: 1000,
         step: 10,
         unit: 'Hz'
       },
       {
-        id: 'bpRes',
-        label: 'BP Q',
-        min: 0.1,
-        max: 20,
-        default: 1,
+        id: 'filterRes',
+        label: 'Res',
+        min: 0.5,
+        max: 10,
+        default: 0.707,
         step: 0.1,
         unit: ''
       }
@@ -160,19 +149,26 @@ export const EFFECTS: EffectConfig[] = [
         id: 'clipMode',
         label: 'Mode',
         min: 0,
-        max: 2,
-        default: 0,
+        max: 0,
+        default: 'fold',
         step: 1,
-        unit: ''
+        unit: '',
+        options: [
+          { value: 'fold', label: 'Fold' },
+          { value: 'soft', label: 'Soft' },
+          { value: 'cubic', label: 'Cubic' },
+          { value: 'diode', label: 'Diode' },
+          { value: 'hard', label: 'Hard' }
+        ]
       },
       {
         id: 'wavefolderDrive',
         label: 'Drive',
-        min: 1,
+        min: 0.001,
         max: 10,
         default: 1,
         step: 0.1,
-        unit: 'x'
+        unit: ''
       },
       {
         id: 'bitcrushDepth',
@@ -309,8 +305,8 @@ export const EFFECTS: EffectConfig[] = [
   }
 ]
 
-export function getDefaultEffectValues(): Record<string, number | boolean> {
-  const defaults: Record<string, number | boolean> = {}
+export function getDefaultEffectValues(): Record<string, number | boolean | string> {
+  const defaults: Record<string, number | boolean | string> = {}
   EFFECTS.forEach(effect => {
     effect.parameters.forEach(param => {
       defaults[param.id] = param.default
@@ -326,7 +322,7 @@ export function getDefaultEngineValues(): Record<string, number> {
   const defaults: Record<string, number> = {}
   ENGINE_CONTROLS.forEach(control => {
     control.parameters.forEach(param => {
-      defaults[param.id] = param.default
+      defaults[param.id] = param.default as number
     })
   })
   return defaults

src/constants/defaults.ts

@@ -0,0 +1,23 @@
+export const DEFAULT_VARIABLES = {
+  a: 8,
+  b: 16,
+  c: 32,
+  d: 64
+} as const
+
+export const PLAYBACK_ID = {
+  CUSTOM: 'custom'
+} as const
+
+export const TILE_GRID = {
+  SIZE: 100,
+  COLUMNS: 4
+} as const
+
+export const DEFAULT_DOWNLOAD_OPTIONS = {
+  SAMPLE_RATE: 44100,
+  DURATION: 4,
+  BIT_DEPTH: 24
+} as const
+
+export const LOOP_DURATION = 4

src/domain/audio/AudioPlayer.ts

@@ -1,4 +1,7 @@
 import { EffectsChain } from './effects/EffectsChain'
+import { BytebeatSourceEffect } from './effects/BytebeatSourceEffect'
+import { ModulationEngine } from '../modulation/ModulationEngine'
+import type { LFOWaveform } from '../modulation/LFO'
 import type { EffectValues } from '../../types/effects'
 
 export interface AudioPlayerOptions {
@@ -8,16 +11,15 @@ export interface AudioPlayerOptions {
 
 export class AudioPlayer {
   private audioContext: AudioContext | null = null
-  private sourceNode: AudioBufferSourceNode | null = null
+  private bytebeatSource: BytebeatSourceEffect | null = null
   private effectsChain: EffectsChain | null = null
+  private modulationEngine: ModulationEngine | null = null
   private effectValues: EffectValues = {}
   private startTime: number = 0
-  private pauseTime: number = 0
-  private isLooping: boolean = true
   private sampleRate: number
   private duration: number
-  private pitch: number = 1
   private workletRegistered: boolean = false
+  private currentPitch: number = 1.0
 
   constructor(options: AudioPlayerOptions) {
     this.sampleRate = options.sampleRate
@@ -40,11 +42,12 @@ export class AudioPlayer {
   }
 
   private async recreateAudioContext(): Promise<void> {
-    const wasPlaying = this.sourceNode !== null
+    const wasPlaying = this.bytebeatSource !== null
 
     this.dispose()
 
     this.audioContext = new AudioContext({ sampleRate: this.sampleRate })
+    this.workletRegistered = false
     await this.registerWorklet(this.audioContext)
 
     this.effectsChain = new EffectsChain(this.audioContext)
@@ -52,19 +55,20 @@ export class AudioPlayer {
     this.effectsChain.updateEffects(this.effectValues)
 
     if (wasPlaying) {
-      console.warn('Audio context recreated due to sample rate change. Playback stopped.')
+      throw new Error('Cannot change sample rate during playback')
     }
   }
 
   private async registerWorklet(context: AudioContext): Promise<void> {
     if (this.workletRegistered) return
 
-    try {
-      await context.audioWorklet.addModule('/worklets/fold-crush-processor.js')
+    await Promise.all([
+      context.audioWorklet.addModule('/worklets/svf-processor.js'),
+      context.audioWorklet.addModule('/worklets/fold-crush-processor.js'),
+      context.audioWorklet.addModule('/worklets/bytebeat-processor.js'),
+      context.audioWorklet.addModule('/worklets/output-limiter.js')
+    ])
     this.workletRegistered = true
-    } catch (error) {
-      console.error('Failed to register AudioWorklet:', error)
-    }
   }
 
   setEffects(values: EffectValues): void {
@@ -72,20 +76,18 @@ export class AudioPlayer {
     if (this.effectsChain) {
       this.effectsChain.updateEffects(values)
     }
+    if (this.modulationEngine) {
+      const numericValues: Record<string, number> = {}
+      Object.entries(values).forEach(([key, value]) => {
+        if (typeof value === 'number') {
+          numericValues[key] = value
         }
-
-  setPitch(pitch: number): void {
-    this.pitch = pitch
-    if (this.sourceNode && this.audioContext) {
-      this.sourceNode.playbackRate.setTargetAtTime(
-        pitch,
-        this.audioContext.currentTime,
-        0.015
-      )
+      })
+      this.modulationEngine.setBaseValues(numericValues)
     }
   }
 
-  async play(buffer: Float32Array, onEnded?: () => void): Promise<void> {
+  private async ensureAudioContext(): Promise<void> {
     if (!this.audioContext) {
       this.audioContext = new AudioContext({ sampleRate: this.sampleRate })
       await this.registerWorklet(this.audioContext)
@@ -97,77 +99,120 @@ export class AudioPlayer {
       this.effectsChain.updateEffects(this.effectValues)
     }
 
-    if (this.sourceNode) {
-      this.sourceNode.stop()
-    }
-
-    const audioBuffer = this.audioContext.createBuffer(1, buffer.length, this.sampleRate)
-    audioBuffer.getChannelData(0).set(buffer)
-
-    this.sourceNode = this.audioContext.createBufferSource()
-    this.sourceNode.buffer = audioBuffer
-    this.sourceNode.loop = this.isLooping
-    this.sourceNode.playbackRate.value = this.pitch
-
-    if (onEnded) {
-      this.sourceNode.onended = onEnded
-    }
-
-    this.sourceNode.connect(this.effectsChain.getInputNode())
-    this.effectsChain.getOutputNode().connect(this.audioContext.destination)
-
-    if (this.pauseTime > 0) {
-      this.sourceNode.start(0, this.pauseTime)
-      this.startTime = this.audioContext.currentTime - this.pauseTime
-      this.pauseTime = 0
-    } else {
-      this.sourceNode.start(0)
-      this.startTime = this.audioContext.currentTime
+    if (!this.modulationEngine) {
+      this.modulationEngine = new ModulationEngine(this.audioContext, 4)
+      this.registerModulatableParams()
     }
   }
 
-  setLooping(loop: boolean): void {
-    this.isLooping = loop
-    if (this.sourceNode) {
-      this.sourceNode.loop = loop
+  private registerModulatableParams(): void {
+    if (!this.modulationEngine || !this.effectsChain) return
+
+    const effects = this.effectsChain.getEffects()
+    for (const effect of effects) {
+      if (effect.getModulatableParams) {
+        const params = effect.getModulatableParams()
+        params.forEach((audioParam, paramId) => {
+          const baseValue = this.effectValues[paramId] as number ?? audioParam.value
+          this.modulationEngine!.registerParameter(
+            paramId,
+            { audioParam },
+            baseValue
+          )
+        })
       }
     }
 
-  scheduleNextTrack(callback: () => void): void {
-    if (this.sourceNode) {
-      this.sourceNode.loop = false
-      this.sourceNode.onended = callback
+    this.modulationEngine.registerParameter(
+      'pitch',
+      { callback: (value: number) => this.applyPitch(value) },
+      this.currentPitch
+    )
+  }
+
+  setLFOConfig(lfoIndex: number, config: { frequency: number; phase: number; waveform: LFOWaveform; mappings: Array<{ targetParam: string; depth: number }> }): void {
+    if (!this.modulationEngine) return
+
+    this.modulationEngine.updateLFO(lfoIndex, config.frequency, config.phase, config.waveform)
+    this.modulationEngine.clearMappings(lfoIndex)
+
+    for (const mapping of config.mappings) {
+      this.modulationEngine.addMapping(lfoIndex, mapping.targetParam, mapping.depth)
+    }
+  }
+
+  async playRealtime(formula: string, a: number, b: number, c: number, d: number): Promise<void> {
+    await this.ensureAudioContext()
+
+    if (!this.bytebeatSource) {
+      this.bytebeatSource = new BytebeatSourceEffect(this.audioContext!)
+      await this.bytebeatSource.initialize(this.audioContext!)
+    }
+
+    this.bytebeatSource.setLoopLength(this.sampleRate, this.duration)
+    this.bytebeatSource.setFormula(formula)
+    this.bytebeatSource.setVariables(a, b, c, d)
+    this.bytebeatSource.setPlaybackRate(this.currentPitch)
+    this.bytebeatSource.reset()
+
+    this.bytebeatSource.getOutputNode().connect(this.effectsChain!.getInputNode())
+    this.effectsChain!.getOutputNode().connect(this.audioContext!.destination)
+
+    if (this.modulationEngine) {
+      this.modulationEngine.start()
+    }
+
+    this.startTime = this.audioContext!.currentTime
+  }
+
+  updateRealtimeVariables(a: number, b: number, c: number, d: number): void {
+    if (this.bytebeatSource) {
+      this.bytebeatSource.setVariables(a, b, c, d)
+    }
+  }
+
+  private applyPitch(pitch: number): void {
+    if (this.bytebeatSource) {
+      this.bytebeatSource.setPlaybackRate(pitch)
+    }
+  }
+
+  updatePitch(pitch: number): void {
+    this.currentPitch = pitch
+    this.applyPitch(pitch)
+    if (this.modulationEngine) {
+      this.modulationEngine.updateBaseValue('pitch', pitch)
     }
   }
 
   getPlaybackPosition(): number {
-    if (!this.audioContext || !this.sourceNode || this.startTime === 0) {
+    if (!this.audioContext || this.startTime === 0) {
       return 0
     }
     const elapsed = this.audioContext.currentTime - this.startTime
-    const actualDuration = this.duration / this.pitch
-    return (elapsed % actualDuration) / actualDuration
-  }
-
-  pause(): void {
-    if (this.sourceNode && this.audioContext) {
-      this.pauseTime = this.audioContext.currentTime - this.startTime
-      this.sourceNode.stop()
-      this.sourceNode = null
-    }
+    return (elapsed % this.duration) / this.duration
   }
 
   stop(): void {
-    if (this.sourceNode) {
-      this.sourceNode.stop()
-      this.sourceNode = null
+    if (this.bytebeatSource) {
+      this.bytebeatSource.getOutputNode().disconnect()
+    }
+    if (this.modulationEngine) {
+      this.modulationEngine.stop()
     }
     this.startTime = 0
-    this.pauseTime = 0
   }
 
   dispose(): void {
     this.stop()
+    if (this.bytebeatSource) {
+      this.bytebeatSource.dispose()
+      this.bytebeatSource = null
+    }
+    if (this.modulationEngine) {
+      this.modulationEngine.dispose()
+      this.modulationEngine = null
+    }
     if (this.effectsChain) {
       this.effectsChain.dispose()
       this.effectsChain = null
@@ -176,5 +221,7 @@ export class AudioPlayer {
       this.audioContext.close()
       this.audioContext = null
     }
+    this.workletRegistered = false
+    this.startTime = 0
   }
 }

src/domain/audio/BytebeatCompiler.ts

@@ -1,4 +1,4 @@
-export type CompiledFormula = (t: number) => number
+export type CompiledFormula = (t: number, a: number, b: number, c: number, d: number) => number
 
 export interface CompilationResult {
   success: boolean
@@ -8,7 +8,7 @@ export interface CompilationResult {
 
 export function compileFormula(formula: string): CompilationResult {
   try {
-    const compiledFormula = new Function('t', `return ${formula}`) as CompiledFormula
+    const compiledFormula = new Function('t', 'a', 'b', 'c', 'd', `return ${formula}`) as CompiledFormula
     return {
       success: true,
       compiledFormula
@@ -28,7 +28,7 @@ export function testFormula(formula: string): boolean {
   }
 
   try {
-    result.compiledFormula(0)
+    result.compiledFormula(0, 8, 16, 32, 64)
     return true
   } catch {
     return false

src/domain/audio/SampleGenerator.ts

@@ -3,22 +3,26 @@ import type { CompiledFormula } from './BytebeatCompiler'
 export interface GeneratorOptions {
   sampleRate: number
   duration: number
+  a?: number
+  b?: number
+  c?: number
+  d?: number
 }
 
 export function generateSamples(
   compiledFormula: CompiledFormula,
   options: GeneratorOptions
 ): Float32Array {
-  const { sampleRate, duration } = options
+  const { sampleRate, duration, a = 8, b = 16, c = 32, d = 64 } = options
   const numSamples = Math.floor(sampleRate * duration)
   const buffer = new Float32Array(numSamples)
 
   for (let t = 0; t < numSamples; t++) {
     try {
-      const value = compiledFormula(t)
+      const value = compiledFormula(t, a, b, c, d)
       const byteValue = value & 0xFF
       buffer[t] = (byteValue - 128) / 128
-    } catch (error) {
+    } catch {
       buffer[t] = 0
     }
   }
@@ -31,7 +35,7 @@ export function generateSamplesWithBitDepth(
   options: GeneratorOptions,
   bitDepth: 8 | 16 | 24
 ): Float32Array {
-  const { sampleRate, duration } = options
+  const { sampleRate, duration, a = 8, b = 16, c = 32, d = 64 } = options
   const numSamples = Math.floor(sampleRate * duration)
   const buffer = new Float32Array(numSamples)
 
@@ -40,10 +44,10 @@ export function generateSamplesWithBitDepth(
 
   for (let t = 0; t < numSamples; t++) {
     try {
-      const value = compiledFormula(t)
+      const value = compiledFormula(t, a, b, c, d)
       const clampedValue = value & maxValue
       buffer[t] = (clampedValue - midPoint) / midPoint
-    } catch (error) {
+    } catch {
       buffer[t] = 0
     }
   }

src/domain/audio/WavExporter.ts

@@ -1,13 +1,70 @@
-import { encodeWAV } from '../../lib/bytebeat/wavEncoder'
-import type { BitDepth } from '../../lib/bytebeat/types'
-
-export type { BitDepth }
+export type BitDepth = 8 | 16 | 24
 
 export interface ExportOptions {
   sampleRate: number
   bitDepth?: BitDepth
 }
 
+function encodeWAV(samples: Float32Array, sampleRate: number, bitDepth: BitDepth): Blob {
+  const numChannels = 1
+  const bytesPerSample = bitDepth / 8
+  const blockAlign = numChannels * bytesPerSample
+  const byteRate = sampleRate * blockAlign
+  const dataSize = samples.length * bytesPerSample
+  const bufferSize = 44 + dataSize
+
+  const buffer = new ArrayBuffer(bufferSize)
+  const view = new DataView(buffer)
+
+  const writeString = (offset: number, string: string) => {
+    for (let i = 0; i < string.length; i++) {
+      view.setUint8(offset + i, string.charCodeAt(i))
+    }
+  }
+
+  writeString(0, 'RIFF')
+  view.setUint32(4, 36 + dataSize, true)
+  writeString(8, 'WAVE')
+  writeString(12, 'fmt ')
+  view.setUint32(16, 16, true)
+  view.setUint16(20, 1, true)
+  view.setUint16(22, numChannels, true)
+  view.setUint32(24, sampleRate, true)
+  view.setUint32(28, byteRate, true)
+  view.setUint16(32, blockAlign, true)
+  view.setUint16(34, bitDepth, true)
+  writeString(36, 'data')
+  view.setUint32(40, dataSize, true)
+
+  const maxValue = Math.pow(2, bitDepth - 1) - 1
+  let offset = 44
+
+  for (let i = 0; i < samples.length; i++) {
+    const sample = Math.max(-1, Math.min(1, samples[i]))
+    const intSample = Math.round(sample * maxValue)
+
+    if (bitDepth === 8) {
+      view.setUint8(offset, intSample + 128)
+      offset += 1
+    } else if (bitDepth === 16) {
+      view.setInt16(offset, intSample, true)
+      offset += 2
+    } else if (bitDepth === 24) {
+      const bytes = [
+        intSample & 0xff,
+        (intSample >> 8) & 0xff,
+        (intSample >> 16) & 0xff
+      ]
+      view.setUint8(offset, bytes[0])
+      view.setUint8(offset + 1, bytes[1])
+      view.setUint8(offset + 2, bytes[2])
+      offset += 3
+    }
+  }
+
+  return new Blob([buffer], { type: 'audio/wav' })
+}
+
 export function exportToWav(
   samples: Float32Array,
   options: ExportOptions

src/domain/audio/effects/BitcrushEffect.ts

@@ -72,12 +72,12 @@ export class BitcrushEffect implements Effect {
     }
   }
 
-  updateParams(values: Record<string, number>): void {
-    if (values.bitcrushDepth !== undefined) {
+  updateParams(values: Record<string, number | string>): void {
+    if (values.bitcrushDepth !== undefined && typeof values.bitcrushDepth === 'number') {
       this.bitDepth = values.bitcrushDepth
     }
 
-    if (values.bitcrushRate !== undefined) {
+    if (values.bitcrushRate !== undefined && typeof values.bitcrushRate === 'number') {
       this.crushAmount = values.bitcrushRate
     }
   }

src/domain/audio/effects/BytebeatSourceEffect.ts

@@ -0,0 +1,69 @@
+import type { Effect } from './Effect.interface'
+
+export class BytebeatSourceEffect implements Effect {
+  readonly id = 'bytebeat-source'
+
+  private inputNode: GainNode
+  private outputNode: GainNode
+  private processorNode: AudioWorkletNode | null = null
+
+  constructor(audioContext: AudioContext) {
+    this.inputNode = audioContext.createGain()
+    this.outputNode = audioContext.createGain()
+  }
+
+  async initialize(audioContext: AudioContext): Promise<void> {
+    this.processorNode = new AudioWorkletNode(audioContext, 'bytebeat-processor')
+    this.processorNode.connect(this.outputNode)
+  }
+
+  getInputNode(): AudioNode {
+    return this.inputNode
+  }
+
+  getOutputNode(): AudioNode {
+    return this.outputNode
+  }
+
+  setBypass(): void {
+    // Source node doesn't support bypass
+  }
+
+  updateParams(): void {
+    // Parameters handled via specific methods
+  }
+
+  setFormula(formula: string): void {
+    if (!this.processorNode) return
+    this.processorNode.port.postMessage({ type: 'formula', value: formula })
+  }
+
+  setVariables(a: number, b: number, c: number, d: number): void {
+    if (!this.processorNode) return
+    this.processorNode.port.postMessage({ type: 'variables', value: { a, b, c, d } })
+  }
+
+  setLoopLength(sampleRate: number, duration: number): void {
+    if (!this.processorNode) return
+    const loopLength = sampleRate * duration
+    this.processorNode.port.postMessage({ type: 'loopLength', value: loopLength })
+  }
+
+  setPlaybackRate(rate: number): void {
+    if (!this.processorNode) return
+    this.processorNode.port.postMessage({ type: 'playbackRate', value: rate })
+  }
+
+  reset(): void {
+    if (!this.processorNode) return
+    this.processorNode.port.postMessage({ type: 'reset' })
+  }
+
+  dispose(): void {
+    if (this.processorNode) {
+      this.processorNode.disconnect()
+    }
+    this.inputNode.disconnect()
+    this.outputNode.disconnect()
+  }
+}

src/domain/audio/effects/DelayEffect.ts

@@ -92,8 +92,8 @@ export class DelayEffect implements Effect {
     }
   }
 
-  updateParams(values: Record<string, number>): void {
-    if (values.delayTime !== undefined) {
+  updateParams(values: Record<string, number | string>): void {
+    if (values.delayTime !== undefined && typeof values.delayTime === 'number') {
       const time = values.delayTime / 1000
       this.delayNode.delayTime.setTargetAtTime(
         time,
@@ -102,7 +102,7 @@ export class DelayEffect implements Effect {
       )
     }
 
-    if (values.delayFeedback !== undefined) {
+    if (values.delayFeedback !== undefined && typeof values.delayFeedback === 'number') {
       const feedback = values.delayFeedback / 100
       this.feedbackNode.gain.setTargetAtTime(
         feedback * 0.95,
@@ -111,7 +111,7 @@ export class DelayEffect implements Effect {
       )
     }
 
-    if (values.delayWetDry !== undefined) {
+    if (values.delayWetDry !== undefined && typeof values.delayWetDry === 'number') {
       const wet = values.delayWetDry / 100
       this.currentWetValue = wet
       this.currentDryValue = 1 - wet
@@ -130,7 +130,7 @@ export class DelayEffect implements Effect {
       }
     }
 
-    if (values.delayTone !== undefined) {
+    if (values.delayTone !== undefined && typeof values.delayTone === 'number') {
       const tone = values.delayTone / 100
       const freq = 200 + tone * 7800
       this.filterNode.frequency.setTargetAtTime(
@@ -140,12 +140,12 @@ export class DelayEffect implements Effect {
       )
     }
 
-    if (values.delaySaturation !== undefined) {
+    if (values.delaySaturation !== undefined && typeof values.delaySaturation === 'number') {
       const saturation = values.delaySaturation / 100
       this.createSaturationCurve(saturation)
     }
 
-    if (values.delayFlutter !== undefined) {
+    if (values.delayFlutter !== undefined && typeof values.delayFlutter === 'number') {
       const flutter = values.delayFlutter / 100
       const baseDelay = this.delayNode.delayTime.value
       const modDepth = baseDelay * flutter * 0.1

src/domain/audio/effects/Effect.interface.ts

@@ -2,8 +2,9 @@ export interface Effect {
   readonly id: string
   getInputNode(): AudioNode
   getOutputNode(): AudioNode
-  updateParams(values: Record<string, number>): void
+  updateParams(values: Record<string, number | string>): void
   setBypass(bypass: boolean): void
+  getModulatableParams?(): Map<string, AudioParam>
   dispose(): void
 }
 

src/domain/audio/effects/EffectsChain.ts

@@ -3,33 +3,43 @@ import { FilterEffect } from './FilterEffect'
 import { FoldCrushEffect } from './FoldCrushEffect'
 import { DelayEffect } from './DelayEffect'
 import { ReverbEffect } from './ReverbEffect'
+import { OutputLimiter } from './OutputLimiter'
 
 export class EffectsChain {
   private inputNode: GainNode
   private outputNode: GainNode
   private masterGainNode: GainNode
   private effects: Effect[]
+  private filterEffect: FilterEffect
   private foldCrushEffect: FoldCrushEffect
+  private outputLimiter: OutputLimiter
 
   constructor(audioContext: AudioContext) {
     this.inputNode = audioContext.createGain()
     this.outputNode = audioContext.createGain()
     this.masterGainNode = audioContext.createGain()
 
+    this.filterEffect = new FilterEffect(audioContext)
     this.foldCrushEffect = new FoldCrushEffect(audioContext)
+    this.outputLimiter = new OutputLimiter(audioContext)
 
     this.effects = [
-      new FilterEffect(audioContext),
+      this.filterEffect,
       this.foldCrushEffect,
       new DelayEffect(audioContext),
-      new ReverbEffect(audioContext)
+      new ReverbEffect(audioContext),
+      this.outputLimiter
     ]
 
     this.setupChain()
   }
 
   async initialize(audioContext: AudioContext): Promise<void> {
-    await this.foldCrushEffect.initialize(audioContext)
+    await Promise.all([
+      this.filterEffect.initialize(audioContext),
+      this.foldCrushEffect.initialize(audioContext),
+      this.outputLimiter.initialize(audioContext)
+    ])
   }
 
   private setupChain(): void {
@@ -44,7 +54,11 @@ export class EffectsChain {
     this.masterGainNode.connect(this.outputNode)
   }
 
-  updateEffects(values: Record<string, number | boolean>): void {
+  getEffects(): Effect[] {
+    return this.effects
+  }
+
+  updateEffects(values: Record<string, number | boolean | string>): void {
     for (const effect of this.effects) {
       const effectId = effect.id
       const bypassKey = `${effectId}Bypass`
@@ -53,13 +67,13 @@ export class EffectsChain {
         effect.setBypass(Boolean(values[bypassKey]))
       }
 
-      const numericValues: Record<string, number> = {}
+      const effectValues: Record<string, number | string> = {}
       for (const [key, value] of Object.entries(values)) {
-        if (typeof value === 'number') {
-          numericValues[key] = value
+        if (typeof value === 'number' || typeof value === 'string') {
+          effectValues[key] = value
         }
       }
-      effect.updateParams(numericValues)
+      effect.updateParams(effectValues)
     }
 
     if (values.masterVolume !== undefined) {

src/domain/audio/effects/FilterEffect.ts

@@ -3,20 +3,13 @@ import type { Effect } from './Effect.interface'
 export class FilterEffect implements Effect {
   readonly id = 'filter'
 
-  private audioContext: AudioContext
   private inputNode: GainNode
   private outputNode: GainNode
+  private processorNode: AudioWorkletNode | null = null
   private wetNode: GainNode
   private dryNode: GainNode
-  private hpFilter: BiquadFilterNode
-  private lpFilter: BiquadFilterNode
-  private bpFilter: BiquadFilterNode
-  private hpEnabled: boolean = false
-  private lpEnabled: boolean = false
-  private bpEnabled: boolean = false
 
   constructor(audioContext: AudioContext) {
-    this.audioContext = audioContext
     this.inputNode = audioContext.createGain()
     this.outputNode = audioContext.createGain()
     this.wetNode = audioContext.createGain()
@@ -25,27 +18,14 @@ export class FilterEffect implements Effect {
     this.wetNode.gain.value = 0
     this.dryNode.gain.value = 1
 
-    this.hpFilter = audioContext.createBiquadFilter()
-    this.hpFilter.type = 'highpass'
-    this.hpFilter.frequency.value = 1000
-    this.hpFilter.Q.value = 1
-
-    this.lpFilter = audioContext.createBiquadFilter()
-    this.lpFilter.type = 'lowpass'
-    this.lpFilter.frequency.value = 5000
-    this.lpFilter.Q.value = 1
-
-    this.bpFilter = audioContext.createBiquadFilter()
-    this.bpFilter.type = 'bandpass'
-    this.bpFilter.frequency.value = 1000
-    this.bpFilter.Q.value = 1
-
     this.inputNode.connect(this.dryNode)
-    this.inputNode.connect(this.hpFilter)
-    this.hpFilter.connect(this.lpFilter)
-    this.lpFilter.connect(this.bpFilter)
-    this.bpFilter.connect(this.wetNode)
     this.dryNode.connect(this.outputNode)
+  }
+
+  async initialize(audioContext: AudioContext): Promise<void> {
+    this.processorNode = new AudioWorkletNode(audioContext, 'svf-processor')
+    this.inputNode.connect(this.processorNode)
+    this.processorNode.connect(this.wetNode)
     this.wetNode.connect(this.outputNode)
   }
 
@@ -57,117 +37,46 @@ export class FilterEffect implements Effect {
     return this.outputNode
   }
 
-  setBypass(_bypass: boolean): void {
-    // No global bypass for filters - each filter has individual enable switch
-  }
-
-  private updateBypassState(): void {
-    const anyEnabled = this.hpEnabled || this.lpEnabled || this.bpEnabled
-    if (anyEnabled) {
-      this.wetNode.gain.value = 1
-      this.dryNode.gain.value = 0
-    } else {
+  setBypass(bypass: boolean): void {
+    if (bypass) {
       this.wetNode.gain.value = 0
       this.dryNode.gain.value = 1
+    } else {
+      this.wetNode.gain.value = 1
+      this.dryNode.gain.value = 0
     }
   }
 
-  updateParams(values: Record<string, number>): void {
-    if (values.hpEnable !== undefined) {
-      this.hpEnabled = values.hpEnable === 1
-      this.updateBypassState()
+  getModulatableParams(): Map<string, AudioParam> {
+    if (!this.processorNode) return new Map()
+
+    const params = new Map<string, AudioParam>()
+    params.set('filterFreq', this.processorNode.parameters.get('frequency')!)
+    params.set('filterRes', this.processorNode.parameters.get('resonance')!)
+    return params
   }
 
-    if (values.hpFreq !== undefined) {
-      this.hpFilter.frequency.cancelScheduledValues(this.audioContext.currentTime)
-      this.hpFilter.frequency.setValueAtTime(
-        this.hpFilter.frequency.value,
-        this.audioContext.currentTime
-      )
-      this.hpFilter.frequency.linearRampToValueAtTime(
-        values.hpFreq,
-        this.audioContext.currentTime + 0.02
-      )
-    }
+  updateParams(values: Record<string, number | string>): void {
+    if (!this.processorNode) return
 
-    if (values.hpRes !== undefined) {
-      this.hpFilter.Q.cancelScheduledValues(this.audioContext.currentTime)
-      this.hpFilter.Q.setValueAtTime(
-        this.hpFilter.Q.value,
-        this.audioContext.currentTime
-      )
-      this.hpFilter.Q.linearRampToValueAtTime(
-        values.hpRes,
-        this.audioContext.currentTime + 0.02
-      )
+    if (values.filterMode !== undefined) {
+      this.processorNode.port.postMessage({ type: 'mode', value: values.filterMode })
     }
-
-    if (values.lpEnable !== undefined) {
-      this.lpEnabled = values.lpEnable === 1
-      this.updateBypassState()
+    if (values.filterFreq !== undefined && typeof values.filterFreq === 'number') {
+      this.processorNode.parameters.get('frequency')!.value = values.filterFreq
     }
-
-    if (values.lpFreq !== undefined) {
-      this.lpFilter.frequency.cancelScheduledValues(this.audioContext.currentTime)
-      this.lpFilter.frequency.setValueAtTime(
-        this.lpFilter.frequency.value,
-        this.audioContext.currentTime
-      )
-      this.lpFilter.frequency.linearRampToValueAtTime(
-        values.lpFreq,
-        this.audioContext.currentTime + 0.02
-      )
-    }
-
-    if (values.lpRes !== undefined) {
-      this.lpFilter.Q.cancelScheduledValues(this.audioContext.currentTime)
-      this.lpFilter.Q.setValueAtTime(
-        this.lpFilter.Q.value,
-        this.audioContext.currentTime
-      )
-      this.lpFilter.Q.linearRampToValueAtTime(
-        values.lpRes,
-        this.audioContext.currentTime + 0.02
-      )
-    }
-
-    if (values.bpEnable !== undefined) {
-      this.bpEnabled = values.bpEnable === 1
-      this.updateBypassState()
-    }
-
-    if (values.bpFreq !== undefined) {
-      this.bpFilter.frequency.cancelScheduledValues(this.audioContext.currentTime)
-      this.bpFilter.frequency.setValueAtTime(
-        this.bpFilter.frequency.value,
-        this.audioContext.currentTime
-      )
-      this.bpFilter.frequency.linearRampToValueAtTime(
-        values.bpFreq,
-        this.audioContext.currentTime + 0.02
-      )
-    }
-
-    if (values.bpRes !== undefined) {
-      this.bpFilter.Q.cancelScheduledValues(this.audioContext.currentTime)
-      this.bpFilter.Q.setValueAtTime(
-        this.bpFilter.Q.value,
-        this.audioContext.currentTime
-      )
-      this.bpFilter.Q.linearRampToValueAtTime(
-        values.bpRes,
-        this.audioContext.currentTime + 0.02
-      )
+    if (values.filterRes !== undefined && typeof values.filterRes === 'number') {
+      this.processorNode.parameters.get('resonance')!.value = values.filterRes
     }
   }
 
   dispose(): void {
-    this.inputNode.disconnect()
-    this.outputNode.disconnect()
+    if (this.processorNode) {
+      this.processorNode.disconnect()
+    }
     this.wetNode.disconnect()
     this.dryNode.disconnect()
-    this.hpFilter.disconnect()
-    this.lpFilter.disconnect()
-    this.bpFilter.disconnect()
+    this.inputNode.disconnect()
+    this.outputNode.disconnect()
   }
 }

src/domain/audio/effects/FoldCrushEffect.ts

@@ -15,22 +15,18 @@ export class FoldCrushEffect implements Effect {
     this.wetNode = audioContext.createGain()
     this.dryNode = audioContext.createGain()
 
-    this.wetNode.gain.value = 1
-    this.dryNode.gain.value = 0
+    this.wetNode.gain.value = 0
+    this.dryNode.gain.value = 1
 
     this.inputNode.connect(this.dryNode)
     this.dryNode.connect(this.outputNode)
   }
 
   async initialize(audioContext: AudioContext): Promise<void> {
-    try {
     this.processorNode = new AudioWorkletNode(audioContext, 'fold-crush-processor')
     this.inputNode.connect(this.processorNode)
     this.processorNode.connect(this.wetNode)
     this.wetNode.connect(this.outputNode)
-    } catch (error) {
-      console.error('Failed to initialize FoldCrushEffect worklet:', error)
-    }
   }
 
   getInputNode(): AudioNode {
@@ -51,13 +47,11 @@ export class FoldCrushEffect implements Effect {
     }
   }
 
-  updateParams(values: Record<string, number>): void {
+  updateParams(values: Record<string, number | string>): void {
     if (!this.processorNode) return
 
     if (values.clipMode !== undefined) {
-      const modeIndex = values.clipMode
-      const clipMode = ['wrap', 'clamp', 'fold'][modeIndex] || 'wrap'
-      this.processorNode.port.postMessage({ type: 'clipMode', value: clipMode })
+      this.processorNode.port.postMessage({ type: 'clipMode', value: values.clipMode })
     }
     if (values.wavefolderDrive !== undefined) {
       this.processorNode.port.postMessage({ type: 'drive', value: values.wavefolderDrive })

src/domain/audio/effects/OutputLimiter.ts

@@ -0,0 +1,48 @@
+import type { Effect } from './Effect.interface'
+
+export class OutputLimiter implements Effect {
+  readonly id = 'limiter'
+
+  private inputNode: GainNode
+  private outputNode: GainNode
+  private processorNode: AudioWorkletNode | null = null
+
+  constructor(audioContext: AudioContext) {
+    this.inputNode = audioContext.createGain()
+    this.outputNode = audioContext.createGain()
+
+    this.inputNode.connect(this.outputNode)
+  }
+
+  async initialize(audioContext: AudioContext): Promise<void> {
+    this.processorNode = new AudioWorkletNode(audioContext, 'output-limiter')
+
+    this.inputNode.disconnect()
+    this.inputNode.connect(this.processorNode)
+    this.processorNode.connect(this.outputNode)
+  }
+
+  getInputNode(): AudioNode {
+    return this.inputNode
+  }
+
+  getOutputNode(): AudioNode {
+    return this.outputNode
+  }
+
+  setBypass(): void {
+    // Output limiter is always on
+  }
+
+  updateParams(): void {
+    // Uses default parameters from worklet
+  }
+
+  dispose(): void {
+    if (this.processorNode) {
+      this.processorNode.disconnect()
+    }
+    this.inputNode.disconnect()
+    this.outputNode.disconnect()
+  }
+}

src/domain/audio/effects/PassThroughEffect.ts

@@ -1,30 +0,0 @@
-import type { Effect } from './Effect.interface'
-
-export class PassThroughEffect implements Effect {
-  readonly id: string
-  private node: GainNode
-
-  constructor(audioContext: AudioContext, id: string) {
-    this.id = id
-    this.node = audioContext.createGain()
-    this.node.gain.value = 1
-  }
-
-  getInputNode(): AudioNode {
-    return this.node
-  }
-
-  getOutputNode(): AudioNode {
-    return this.node
-  }
-
-  setBypass(_bypass: boolean): void {
-  }
-
-  updateParams(_values: Record<string, number>): void {
-  }
-
-  dispose(): void {
-    this.node.disconnect()
-  }
-}

src/domain/audio/effects/ReverbEffect.ts

@@ -6,7 +6,6 @@ export class ReverbEffect implements Effect {
   private audioContext: AudioContext
   private inputNode: GainNode
   private outputNode: GainNode
-  private convolverNode: ConvolverNode
   private wetNode: GainNode
   private dryNode: GainNode
   private mixNode: GainNode
@@ -16,15 +15,40 @@ export class ReverbEffect implements Effect {
   private bypassed: boolean = false
   private currentWetValue: number = 0
   private currentDryValue: number = 1
-  private currentDecay: number = 2
-  private currentDamping: number = 50
+  private currentDecay: number = 0.5
+  private currentDamping: number = 0.5
+
+  private earlyReflectionsNode: GainNode
+  private earlyReflectionDelays: DelayNode[] = []
+  private earlyReflectionGains: GainNode[] = []
+  private earlyReflectionFilters: BiquadFilterNode[] = []
+
+  private lowBandSplitter: BiquadFilterNode
+  private midBandLowPass: BiquadFilterNode
+  private midBandHighPass: BiquadFilterNode
+  private highBandSplitter: BiquadFilterNode
+
+  private lowBandProcessor: BandProcessor
+  private midBandProcessor: BandProcessor
+  private highBandProcessor: BandProcessor
+
+  private lowEnvFollower: DynamicsCompressorNode
+  private midEnvFollower: DynamicsCompressorNode
+  private highEnvFollower: DynamicsCompressorNode
+
+  private lowToHighModGain: GainNode
+  private highToLowModGain: GainNode
+  private midToGlobalModGain: GainNode
+
+  private bandMixer: GainNode
 
   constructor(audioContext: AudioContext) {
     this.audioContext = audioContext
+    const sr = audioContext.sampleRate
+
     this.inputNode = audioContext.createGain()
     this.outputNode = audioContext.createGain()
     this.mixNode = audioContext.createGain()
-    this.convolverNode = audioContext.createConvolver()
     this.wetNode = audioContext.createGain()
     this.dryNode = audioContext.createGain()
     this.pannerNode = audioContext.createStereoPanner()
@@ -40,98 +64,146 @@ export class ReverbEffect implements Effect {
     this.panLfoGainNode.connect(this.pannerNode.pan)
     this.panLfoNode.start()
 
+    this.earlyReflectionsNode = audioContext.createGain()
+    this.buildEarlyReflections(sr)
+
+    this.lowBandSplitter = audioContext.createBiquadFilter()
+    this.lowBandSplitter.type = 'lowpass'
+    this.lowBandSplitter.frequency.value = 250
+    this.lowBandSplitter.Q.value = 0.707
+
+    this.midBandHighPass = audioContext.createBiquadFilter()
+    this.midBandHighPass.type = 'highpass'
+    this.midBandHighPass.frequency.value = 250
+    this.midBandHighPass.Q.value = 0.707
+
+    this.midBandLowPass = audioContext.createBiquadFilter()
+    this.midBandLowPass.type = 'lowpass'
+    this.midBandLowPass.frequency.value = 2500
+    this.midBandLowPass.Q.value = 0.707
+
+    this.highBandSplitter = audioContext.createBiquadFilter()
+    this.highBandSplitter.type = 'highpass'
+    this.highBandSplitter.frequency.value = 2500
+    this.highBandSplitter.Q.value = 0.707
+
+    this.lowBandProcessor = new BandProcessor(audioContext, 'low', sr)
+    this.midBandProcessor = new BandProcessor(audioContext, 'mid', sr)
+    this.highBandProcessor = new BandProcessor(audioContext, 'high', sr)
+
+    this.lowEnvFollower = audioContext.createDynamicsCompressor()
+    this.lowEnvFollower.threshold.value = -50
+    this.lowEnvFollower.knee.value = 40
+    this.lowEnvFollower.ratio.value = 12
+    this.lowEnvFollower.attack.value = 0.003
+    this.lowEnvFollower.release.value = 0.25
+
+    this.midEnvFollower = audioContext.createDynamicsCompressor()
+    this.midEnvFollower.threshold.value = -50
+    this.midEnvFollower.knee.value = 40
+    this.midEnvFollower.ratio.value = 12
+    this.midEnvFollower.attack.value = 0.003
+    this.midEnvFollower.release.value = 0.25
+
+    this.highEnvFollower = audioContext.createDynamicsCompressor()
+    this.highEnvFollower.threshold.value = -50
+    this.highEnvFollower.knee.value = 40
+    this.highEnvFollower.ratio.value = 12
+    this.highEnvFollower.attack.value = 0.001
+    this.highEnvFollower.release.value = 0.1
+
+    this.lowToHighModGain = audioContext.createGain()
+    this.highToLowModGain = audioContext.createGain()
+    this.midToGlobalModGain = audioContext.createGain()
+
+    this.bandMixer = audioContext.createGain()
+
+    this.buildGraph()
+    this.updateDecayAndDamping()
+
     this.inputNode.connect(this.dryNode)
-    this.inputNode.connect(this.convolverNode)
-    this.convolverNode.connect(this.wetNode)
     this.dryNode.connect(this.mixNode)
     this.wetNode.connect(this.mixNode)
     this.mixNode.connect(this.pannerNode)
     this.pannerNode.connect(this.outputNode)
-
-    this.convolverNode.buffer = this.createDummyBuffer()
-    this.generateReverb(this.currentDecay, this.currentDamping)
   }
 
-  private createDummyBuffer(): AudioBuffer {
-    const buffer = this.audioContext.createBuffer(2, this.audioContext.sampleRate * 0.1, this.audioContext.sampleRate)
-    for (let i = 0; i < 2; i++) {
-      const data = buffer.getChannelData(i)
-      for (let j = 0; j < data.length; j++) {
-        data[j] = (Math.random() * 2 - 1) * Math.exp(-j / (this.audioContext.sampleRate * 0.05))
-      }
-    }
-    return buffer
-  }
+  private buildEarlyReflections(sr: number): void {
+    const primes = [17, 29, 41, 59, 71, 97, 113, 127]
+    const scale = sr / 48000
 
-  private generateReverb(decayTime: number, damping: number): void {
-    const sampleRate = this.audioContext.sampleRate
-    const numChannels = 2
-    const totalTime = decayTime * 1.5
-    const decaySampleFrames = Math.round(decayTime * sampleRate)
-    const numSampleFrames = Math.round(totalTime * sampleRate)
-    const fadeInTime = 0.05
-    const fadeInSampleFrames = Math.round(fadeInTime * sampleRate)
-    const decayBase = Math.pow(1 / 1000, 1 / decaySampleFrames)
+    for (let i = 0; i < primes.length; i++) {
+      const delay = this.audioContext.createDelay(0.2)
+      delay.delayTime.value = (primes[i] * scale) / 1000
 
-    const reverbIR = this.audioContext.createBuffer(numChannels, numSampleFrames, sampleRate)
+      const gain = this.audioContext.createGain()
+      gain.gain.value = 0.7 * Math.pow(0.85, i)
 
-    for (let i = 0; i < numChannels; i++) {
-      const chan = reverbIR.getChannelData(i)
-      for (let j = 0; j < numSampleFrames; j++) {
-        chan[j] = (Math.random() * 2 - 1) * Math.pow(decayBase, j)
-      }
-      for (let j = 0; j < fadeInSampleFrames; j++) {
-        chan[j] *= j / fadeInSampleFrames
+      const filter = this.audioContext.createBiquadFilter()
+      filter.type = i % 2 === 0 ? 'lowpass' : 'highshelf'
+      filter.frequency.value = 3000 + i * 500
+      filter.gain.value = -2 * i
+
+      this.earlyReflectionDelays.push(delay)
+      this.earlyReflectionGains.push(gain)
+      this.earlyReflectionFilters.push(filter)
     }
   }
 
-    const lpFreqStart = 10000
-    const lpFreqEnd = 200 + (damping / 100) * 7800
+  private buildGraph(): void {
+    this.inputNode.connect(this.earlyReflectionsNode)
 
-    this.applyGradualLowpass(reverbIR, lpFreqStart, lpFreqEnd, decayTime, (buffer) => {
-      this.convolverNode.buffer = buffer
-    })
+    for (let i = 0; i < this.earlyReflectionDelays.length; i++) {
+      this.earlyReflectionsNode.connect(this.earlyReflectionDelays[i])
+      this.earlyReflectionDelays[i].connect(this.earlyReflectionFilters[i])
+      this.earlyReflectionFilters[i].connect(this.earlyReflectionGains[i])
+      this.earlyReflectionGains[i].connect(this.wetNode)
     }
 
-  private applyGradualLowpass(
-    input: AudioBuffer,
-    lpFreqStart: number,
-    lpFreqEnd: number,
-    lpFreqEndAt: number,
-    callback: (buffer: AudioBuffer) => void
-  ): void {
-    if (lpFreqStart === 0) {
-      callback(input)
-      return
+    this.earlyReflectionsNode.connect(this.lowBandSplitter)
+    this.earlyReflectionsNode.connect(this.midBandHighPass)
+    this.earlyReflectionsNode.connect(this.highBandSplitter)
+
+    this.midBandHighPass.connect(this.midBandLowPass)
+
+    this.lowBandSplitter.connect(this.lowBandProcessor.getInputNode())
+    this.midBandLowPass.connect(this.midBandProcessor.getInputNode())
+    this.highBandSplitter.connect(this.highBandProcessor.getInputNode())
+
+    this.lowBandProcessor.getOutputNode().connect(this.lowEnvFollower)
+    this.midBandProcessor.getOutputNode().connect(this.midEnvFollower)
+    this.highBandProcessor.getOutputNode().connect(this.highEnvFollower)
+
+    this.lowEnvFollower.connect(this.lowToHighModGain)
+    this.highEnvFollower.connect(this.highToLowModGain)
+    this.midEnvFollower.connect(this.midToGlobalModGain)
+
+    this.lowToHighModGain.connect(this.highBandProcessor.getModulationTarget())
+    this.highToLowModGain.connect(this.lowBandProcessor.getModulationTarget())
+
+    this.lowBandProcessor.getOutputNode().connect(this.bandMixer)
+    this.midBandProcessor.getOutputNode().connect(this.bandMixer)
+    this.highBandProcessor.getOutputNode().connect(this.bandMixer)
+
+    this.bandMixer.connect(this.wetNode)
   }
 
-    const context = new OfflineAudioContext(
-      input.numberOfChannels,
-      input.length,
-      input.sampleRate
-    )
+  private updateDecayAndDamping(): void {
+    const decay = this.currentDecay
+    const damping = this.currentDamping
 
-    const player = context.createBufferSource()
-    player.buffer = input
+    this.lowBandProcessor.setDecay(decay * 1.2)
+    this.midBandProcessor.setDecay(decay)
+    this.highBandProcessor.setDecay(decay * 0.6)
 
-    const filter = context.createBiquadFilter()
-    lpFreqStart = Math.min(lpFreqStart, input.sampleRate / 2)
-    lpFreqEnd = Math.min(lpFreqEnd, input.sampleRate / 2)
+    this.lowBandProcessor.setDamping(damping * 0.5)
+    this.midBandProcessor.setDamping(damping)
+    this.highBandProcessor.setDamping(damping * 1.5)
 
-    filter.type = 'lowpass'
-    filter.Q.value = 0.0001
-    filter.frequency.setValueAtTime(lpFreqStart, 0)
-    filter.frequency.linearRampToValueAtTime(lpFreqEnd, lpFreqEndAt)
-
-    player.connect(filter)
-    filter.connect(context.destination)
-    player.start()
-
-    context.oncomplete = (event) => {
-      callback(event.renderedBuffer)
-    }
-
-    context.startRendering()
+    const modAmount = 0.3
+    this.lowToHighModGain.gain.value = modAmount
+    this.highToLowModGain.gain.value = modAmount * 0.7
+    this.midToGlobalModGain.gain.value = modAmount * 0.5
   }
 
   getInputNode(): AudioNode {
@@ -153,20 +225,20 @@ export class ReverbEffect implements Effect {
     }
   }
 
-  updateParams(values: Record<string, number>): void {
-    let needsRegeneration = false
+  updateParams(values: Record<string, number | string>): void {
+    let needsUpdate = false
 
-    if (values.reverbDecay !== undefined && values.reverbDecay !== this.currentDecay) {
-      this.currentDecay = values.reverbDecay
-      needsRegeneration = true
+    if (values.reverbDecay !== undefined && typeof values.reverbDecay === 'number') {
+      this.currentDecay = values.reverbDecay / 100
+      needsUpdate = true
     }
 
-    if (values.reverbDamping !== undefined && values.reverbDamping !== this.currentDamping) {
-      this.currentDamping = values.reverbDamping
-      needsRegeneration = true
+    if (values.reverbDamping !== undefined && typeof values.reverbDamping === 'number') {
+      this.currentDamping = values.reverbDamping / 100
+      needsUpdate = true
     }
 
-    if (values.reverbWetDry !== undefined) {
+    if (values.reverbWetDry !== undefined && typeof values.reverbWetDry === 'number') {
       const wet = values.reverbWetDry / 100
       this.currentWetValue = wet
       this.currentDryValue = 1 - wet
@@ -177,7 +249,7 @@ export class ReverbEffect implements Effect {
       }
     }
 
-    if (values.reverbPanRate !== undefined) {
+    if (values.reverbPanRate !== undefined && typeof values.reverbPanRate === 'number') {
       const rate = values.reverbPanRate
       this.panLfoNode.frequency.setTargetAtTime(
         rate,
@@ -186,7 +258,7 @@ export class ReverbEffect implements Effect {
       )
     }
 
-    if (values.reverbPanWidth !== undefined) {
+    if (values.reverbPanWidth !== undefined && typeof values.reverbPanWidth === 'number') {
       const width = values.reverbPanWidth / 100
       this.panLfoGainNode.gain.setTargetAtTime(
         width,
@@ -195,8 +267,8 @@ export class ReverbEffect implements Effect {
       )
     }
 
-    if (needsRegeneration) {
-      this.generateReverb(this.currentDecay, this.currentDamping)
+    if (needsUpdate) {
+      this.updateDecayAndDamping()
     }
   }
 
@@ -207,9 +279,273 @@ export class ReverbEffect implements Effect {
     this.inputNode.disconnect()
     this.outputNode.disconnect()
     this.mixNode.disconnect()
-    this.convolverNode.disconnect()
     this.wetNode.disconnect()
     this.dryNode.disconnect()
     this.pannerNode.disconnect()
+    this.earlyReflectionsNode.disconnect()
+
+    this.earlyReflectionDelays.forEach(d => d.disconnect())
+    this.earlyReflectionGains.forEach(g => g.disconnect())
+    this.earlyReflectionFilters.forEach(f => f.disconnect())
+
+    this.lowBandSplitter.disconnect()
+    this.midBandHighPass.disconnect()
+    this.midBandLowPass.disconnect()
+    this.highBandSplitter.disconnect()
+
+    this.lowBandProcessor.dispose()
+    this.midBandProcessor.dispose()
+    this.highBandProcessor.dispose()
+
+    this.lowEnvFollower.disconnect()
+    this.midEnvFollower.disconnect()
+    this.highEnvFollower.disconnect()
+
+    this.lowToHighModGain.disconnect()
+    this.highToLowModGain.disconnect()
+    this.midToGlobalModGain.disconnect()
+
+    this.bandMixer.disconnect()
+  }
+}
+
+class BandProcessor {
+  private audioContext: AudioContext
+  private bandType: 'low' | 'mid' | 'high'
+
+  private inputNode: GainNode
+  private outputNode: GainNode
+  private modulationTarget: GainNode
+
+  private delay1: DelayNode
+  private delay2: DelayNode
+  private allpass1: DelayNode
+  private allpass2: DelayNode
+
+  private ap1Gain: GainNode
+  private ap2Gain: GainNode
+
+  private filter1: BiquadFilterNode
+  private filter2: BiquadFilterNode
+  private filter3: BiquadFilterNode
+
+  private feedbackGain: GainNode
+  private saturation: WaveShaperNode
+
+  private feedbackMixer: GainNode
+
+  constructor(audioContext: AudioContext, bandType: 'low' | 'mid' | 'high', sr: number) {
+    this.audioContext = audioContext
+    this.bandType = bandType
+
+    this.inputNode = audioContext.createGain()
+    this.outputNode = audioContext.createGain()
+    this.modulationTarget = audioContext.createGain()
+    this.modulationTarget.gain.value = 0
+
+    const scale = sr / 48000
+    const delayTimes = this.getDelayTimes(bandType, scale, sr)
+
+    this.delay1 = audioContext.createDelay(1.0)
+    this.delay2 = audioContext.createDelay(1.0)
+    this.delay1.delayTime.value = delayTimes.d1
+    this.delay2.delayTime.value = delayTimes.d2
+
+    this.allpass1 = audioContext.createDelay(0.1)
+    this.allpass2 = audioContext.createDelay(0.1)
+    this.allpass1.delayTime.value = delayTimes.ap1
+    this.allpass2.delayTime.value = delayTimes.ap2
+
+    this.ap1Gain = audioContext.createGain()
+    this.ap2Gain = audioContext.createGain()
+    this.ap1Gain.gain.value = 0.7
+    this.ap2Gain.gain.value = 0.7
+
+    this.filter1 = audioContext.createBiquadFilter()
+    this.filter2 = audioContext.createBiquadFilter()
+    this.filter3 = audioContext.createBiquadFilter()
+    this.setupFilters(bandType)
+
+    this.feedbackGain = audioContext.createGain()
+    this.feedbackGain.gain.value = 0.5
+
+    this.saturation = audioContext.createWaveShaper()
+    this.saturation.curve = this.createSaturationCurve(bandType)
+    this.saturation.oversample = '2x'
+
+    this.feedbackMixer = audioContext.createGain()
+
+    this.buildGraph()
+  }
+
+  private getDelayTimes(bandType: string, scale: number, sr: number) {
+    const times: Record<string, { d1: number; d2: number; ap1: number; ap2: number }> = {
+      low: {
+        d1: (1201 * scale) / sr,
+        d2: (6171 * scale) / sr,
+        ap1: (2333 * scale) / sr,
+        ap2: (4513 * scale) / sr,
+      },
+      mid: {
+        d1: (907 * scale) / sr,
+        d2: (4217 * scale) / sr,
+        ap1: (1801 * scale) / sr,
+        ap2: (3119 * scale) / sr,
+      },
+      high: {
+        d1: (503 * scale) / sr,
+        d2: (2153 * scale) / sr,
+        ap1: (907 * scale) / sr,
+        ap2: (1453 * scale) / sr,
+      },
+    }
+    return times[bandType]
+  }
+
+  private setupFilters(bandType: string): void {
+    if (bandType === 'low') {
+      this.filter1.type = 'lowpass'
+      this.filter1.frequency.value = 1200
+      this.filter1.Q.value = 0.707
+
+      this.filter2.type = 'lowshelf'
+      this.filter2.frequency.value = 200
+      this.filter2.gain.value = 2
+
+      this.filter3.type = 'peaking'
+      this.filter3.frequency.value = 600
+      this.filter3.Q.value = 1.0
+      this.filter3.gain.value = -3
+    } else if (bandType === 'mid') {
+      this.filter1.type = 'lowpass'
+      this.filter1.frequency.value = 5000
+      this.filter1.Q.value = 0.707
+
+      this.filter2.type = 'peaking'
+      this.filter2.frequency.value = 1200
+      this.filter2.Q.value = 1.5
+      this.filter2.gain.value = -2
+
+      this.filter3.type = 'highshelf'
+      this.filter3.frequency.value = 3000
+      this.filter3.gain.value = -4
+    } else {
+      this.filter1.type = 'lowpass'
+      this.filter1.frequency.value = 12000
+      this.filter1.Q.value = 0.5
+
+      this.filter2.type = 'lowpass'
+      this.filter2.frequency.value = 8000
+      this.filter2.Q.value = 0.707
+
+      this.filter3.type = 'highshelf'
+      this.filter3.frequency.value = 5000
+      this.filter3.gain.value = -6
+    }
+  }
+
+  private createSaturationCurve(bandType: string): Float32Array {
+    const samples = 4096
+    const curve = new Float32Array(samples)
+    const amount = bandType === 'low' ? 0.8 : bandType === 'mid' ? 0.5 : 0.3
+
+    for (let i = 0; i < samples; i++) {
+      const x = (i * 2) / samples - 1
+      curve[i] = Math.tanh(x * (1 + amount)) / (1 + amount * 0.5)
+    }
+
+    return curve
+  }
+
+  private buildGraph(): void {
+    this.inputNode.connect(this.delay1)
+    this.delay1.connect(this.filter1)
+    this.filter1.connect(this.filter2)
+    this.filter2.connect(this.filter3)
+    this.filter3.connect(this.delay2)
+
+    const ap1Out = this.createAllPass(this.delay2, this.allpass1, this.ap1Gain)
+    const ap2Out = this.createAllPass(ap1Out, this.allpass2, this.ap2Gain)
+
+    ap2Out.connect(this.feedbackGain)
+    this.feedbackGain.connect(this.saturation)
+    this.saturation.connect(this.feedbackMixer)
+
+    this.modulationTarget.connect(this.feedbackMixer)
+
+    this.feedbackMixer.connect(this.inputNode)
+
+    ap2Out.connect(this.outputNode)
+  }
+
+  private createAllPass(input: AudioNode, delay: DelayNode, gain: GainNode): AudioNode {
+    const output = this.audioContext.createGain()
+    const feedbackGain = this.audioContext.createGain()
+    feedbackGain.gain.value = -1
+
+    input.connect(delay)
+    input.connect(feedbackGain)
+    feedbackGain.connect(output)
+
+    delay.connect(gain)
+    gain.connect(output)
+    gain.connect(input)
+
+    return output
+  }
+
+  getInputNode(): AudioNode {
+    return this.inputNode
+  }
+
+  getOutputNode(): AudioNode {
+    return this.outputNode
+  }
+
+  getModulationTarget(): AudioNode {
+    return this.modulationTarget
+  }
+
+  setDecay(decay: number): void {
+    this.feedbackGain.gain.setTargetAtTime(
+      Math.min(0.95, decay),
+      this.audioContext.currentTime,
+      0.01
+    )
+  }
+
+  setDamping(damping: number): void {
+    let cutoff: number
+    if (this.bandType === 'low') {
+      cutoff = 500 + damping * 1500
+    } else if (this.bandType === 'mid') {
+      cutoff = 2000 + damping * 6000
+    } else {
+      cutoff = 4000 + damping * 10000
+    }
+
+    this.filter1.frequency.setTargetAtTime(
+      cutoff,
+      this.audioContext.currentTime,
+      0.01
+    )
+  }
+
+  dispose(): void {
+    this.inputNode.disconnect()
+    this.outputNode.disconnect()
+    this.modulationTarget.disconnect()
+    this.delay1.disconnect()
+    this.delay2.disconnect()
+    this.allpass1.disconnect()
+    this.allpass2.disconnect()
+    this.ap1Gain.disconnect()
+    this.ap2Gain.disconnect()
+    this.filter1.disconnect()
+    this.filter2.disconnect()
+    this.filter3.disconnect()
+    this.feedbackGain.disconnect()
+    this.saturation.disconnect()
+    this.feedbackMixer.disconnect()
   }
 }

src/domain/audio/effects/WavefolderEffect.ts

@@ -96,12 +96,11 @@ export class WavefolderEffect implements Effect {
     }
   }
 
-  updateParams(values: Record<string, number>): void {
-    if (values.clipMode !== undefined) {
-      const modeIndex = values.clipMode
-      this.mode = ['wrap', 'clamp', 'fold'][modeIndex] as ClipMode || 'wrap'
+  updateParams(values: Record<string, number | string>): void {
+    if (values.clipMode !== undefined && typeof values.clipMode === 'string') {
+      this.mode = values.clipMode as ClipMode
     }
-    if (values.wavefolderDrive !== undefined) {
+    if (values.wavefolderDrive !== undefined && typeof values.wavefolderDrive === 'number') {
       this.drive = values.wavefolderDrive
     }
   }

src/domain/modulation/LFO.ts

@@ -0,0 +1,66 @@
+export type LFOWaveform = 'sine' | 'triangle' | 'square' | 'sawtooth' | 'random'
+
+export class LFO {
+  private startTime: number
+  private frequency: number
+  private phase: number
+  private waveform: LFOWaveform
+  private audioContext: AudioContext
+  private lastRandomValue: number = 0
+  private lastRandomTime: number = 0
+
+  constructor(audioContext: AudioContext, frequency: number = 1, phase: number = 0, waveform: LFOWaveform = 'sine') {
+    this.audioContext = audioContext
+    this.frequency = frequency
+    this.phase = phase
+    this.waveform = waveform
+    this.startTime = audioContext.currentTime
+  }
+
+  setFrequency(frequency: number): void {
+    this.frequency = frequency
+  }
+
+  setPhase(phase: number): void {
+    this.phase = phase
+  }
+
+  setWaveform(waveform: LFOWaveform): void {
+    this.waveform = waveform
+  }
+
+  getValue(time?: number): number {
+    const currentTime = time ?? this.audioContext.currentTime
+    const elapsed = currentTime - this.startTime
+    const phaseOffset = (this.phase / 360) * (1 / this.frequency)
+    const phase = ((elapsed + phaseOffset) * this.frequency) % 1
+
+    switch (this.waveform) {
+      case 'sine':
+        return Math.sin(phase * 2 * Math.PI)
+
+      case 'triangle':
+        return phase < 0.5
+          ? -1 + 4 * phase
+          : 3 - 4 * phase
+
+      case 'square':
+        return phase < 0.5 ? 1 : -1
+
+      case 'sawtooth':
+        return 2 * phase - 1
+
+      case 'random': {
+        const interval = 1 / this.frequency
+        if (currentTime - this.lastRandomTime >= interval) {
+          this.lastRandomValue = Math.random() * 2 - 1
+          this.lastRandomTime = currentTime
+        }
+        return this.lastRandomValue
+      }
+
+      default:
+        return 0
+    }
+  }
+}

src/domain/modulation/ModulationEngine.ts

@@ -0,0 +1,159 @@
+import { LFO, type LFOWaveform } from './LFO'
+import { parameterRegistry } from './ParameterRegistry'
+
+export interface LFOMapping {
+  lfoIndex: number
+  targetParam: string
+  depth: number
+}
+
+export interface ParameterTarget {
+  audioParam?: AudioParam
+  callback?: (value: number) => void
+}
+
+export class ModulationEngine {
+  private audioContext: AudioContext
+  private lfos: LFO[]
+  private mappings: LFOMapping[]
+  private paramTargets: Map<string, ParameterTarget>
+  private baseValues: Map<string, number>
+  private animationFrameId: number | null = null
+  private isRunning: boolean = false
+
+  constructor(audioContext: AudioContext, lfoCount: number = 4) {
+    this.audioContext = audioContext
+    this.lfos = []
+    this.mappings = []
+    this.paramTargets = new Map()
+    this.baseValues = new Map()
+
+    for (let i = 0; i < lfoCount; i++) {
+      this.lfos.push(new LFO(audioContext))
+    }
+  }
+
+  registerParameter(paramId: string, target: ParameterTarget, baseValue: number): void {
+    this.paramTargets.set(paramId, target)
+    this.baseValues.set(paramId, baseValue)
+  }
+
+  updateBaseValue(paramId: string, baseValue: number): void {
+    this.baseValues.set(paramId, baseValue)
+  }
+
+  setBaseValues(values: Record<string, number>): void {
+    Object.entries(values).forEach(([paramId, value]) => {
+      this.baseValues.set(paramId, value)
+    })
+  }
+
+  addMapping(lfoIndex: number, targetParam: string, depth: number): void {
+    const existingIndex = this.mappings.findIndex(
+      m => m.lfoIndex === lfoIndex && m.targetParam === targetParam
+    )
+
+    if (existingIndex >= 0) {
+      this.mappings[existingIndex].depth = depth
+    } else {
+      this.mappings.push({ lfoIndex, targetParam, depth })
+    }
+  }
+
+  removeMapping(lfoIndex: number, targetParam: string): void {
+    this.mappings = this.mappings.filter(
+      m => !(m.lfoIndex === lfoIndex && m.targetParam === targetParam)
+    )
+  }
+
+  clearMappings(lfoIndex?: number): void {
+    if (lfoIndex !== undefined) {
+      this.mappings = this.mappings.filter(m => m.lfoIndex !== lfoIndex)
+    } else {
+      this.mappings = []
+    }
+  }
+
+  updateLFO(lfoIndex: number, frequency: number, phase: number, waveform: LFOWaveform): void {
+    const lfo = this.lfos[lfoIndex]
+    if (!lfo) return
+
+    lfo.setFrequency(frequency)
+    lfo.setPhase(phase)
+    lfo.setWaveform(waveform)
+  }
+
+  private updateModulation = (): void => {
+    if (!this.isRunning) return
+
+    const currentTime = this.audioContext.currentTime
+
+    const modulatedValues = new Map<string, number>()
+
+    for (const [paramId, baseValue] of this.baseValues) {
+      modulatedValues.set(paramId, baseValue)
+    }
+
+    for (const mapping of this.mappings) {
+      const lfo = this.lfos[mapping.lfoIndex]
+      if (!lfo) continue
+
+      const baseValue = this.baseValues.get(mapping.targetParam)
+      if (baseValue === undefined) continue
+
+      const meta = parameterRegistry.getMetadata(mapping.targetParam)
+      if (!meta) continue
+
+      const lfoValue = lfo.getValue(currentTime)
+      const normalized = parameterRegistry.normalizeValue(mapping.targetParam, baseValue)
+      const depthNormalized = (mapping.depth / 100) * lfoValue
+      const modulatedNormalized = normalized + depthNormalized
+      const modulatedValue = parameterRegistry.denormalizeValue(mapping.targetParam, modulatedNormalized)
+      const clampedValue = parameterRegistry.clampValue(mapping.targetParam, modulatedValue)
+
+      modulatedValues.set(mapping.targetParam, clampedValue)
+    }
+
+    for (const [paramId, value] of modulatedValues) {
+      const target = this.paramTargets.get(paramId)
+      if (!target) continue
+
+      if (target.audioParam) {
+        target.audioParam.setTargetAtTime(value, currentTime, 0.01)
+      } else if (target.callback) {
+        target.callback(value)
+      }
+    }
+
+    this.animationFrameId = requestAnimationFrame(this.updateModulation)
+  }
+
+  start(): void {
+    if (this.isRunning) return
+    this.isRunning = true
+    this.updateModulation()
+  }
+
+  stop(): void {
+    this.isRunning = false
+    if (this.animationFrameId !== null) {
+      cancelAnimationFrame(this.animationFrameId)
+      this.animationFrameId = null
+    }
+  }
+
+  getMappingsForLFO(lfoIndex: number): LFOMapping[] {
+    return this.mappings.filter(m => m.lfoIndex === lfoIndex)
+  }
+
+  getMappingsForParam(paramId: string): LFOMapping[] {
+    return this.mappings.filter(m => m.targetParam === paramId)
+  }
+
+  dispose(): void {
+    this.stop()
+    this.mappings = []
+    this.paramTargets.clear()
+    this.baseValues.clear()
+  }
+}

src/domain/modulation/ParameterRegistry.ts

@@ -0,0 +1,133 @@
+import { ENGINE_CONTROLS, EFFECTS } from '../../config/effects'
+import type { EffectParameter } from '../../types/effects'
+
+export type ParameterScaling = 'linear' | 'exponential'
+
+export interface ParameterMetadata {
+  id: string
+  label: string
+  min: number
+  max: number
+  step: number
+  unit?: string
+  scaling: ParameterScaling
+  isAudioParam: boolean
+  category: 'engine' | 'effect'
+  effectId?: string
+}
+
+export class ParameterRegistry {
+  private metadata: Map<string, ParameterMetadata> = new Map()
+
+  constructor() {
+    this.buildRegistry()
+  }
+
+  private buildRegistry(): void {
+    ENGINE_CONTROLS.forEach(control => {
+      control.parameters.forEach(param => {
+        if (this.isNumericParameter(param)) {
+          this.metadata.set(param.id, {
+            id: param.id,
+            label: param.label,
+            min: param.min,
+            max: param.max,
+            step: param.step,
+            unit: param.unit,
+            scaling: 'linear',
+            isAudioParam: false,
+            category: 'engine'
+          })
+        }
+      })
+    })
+
+    EFFECTS.forEach(effect => {
+      effect.parameters.forEach(param => {
+        if (this.isNumericParameter(param)) {
+          const isFreqParam = param.id.toLowerCase().includes('freq')
+          const isAudioParam = this.checkIfAudioParam(effect.id, param.id)
+
+          this.metadata.set(param.id, {
+            id: param.id,
+            label: param.label,
+            min: param.min,
+            max: param.max,
+            step: param.step,
+            unit: param.unit,
+            scaling: isFreqParam ? 'exponential' : 'linear',
+            isAudioParam,
+            category: 'effect',
+            effectId: effect.id
+          })
+        }
+      })
+    })
+  }
+
+  private isNumericParameter(param: EffectParameter): boolean {
+    return typeof param.default === 'number' && !param.options
+  }
+
+  private checkIfAudioParam(effectId: string, paramId: string): boolean {
+    if (effectId !== 'filter') return false
+
+    const audioParamIds = ['hpFreq', 'hpRes', 'lpFreq', 'lpRes', 'bpFreq', 'bpRes']
+    return audioParamIds.includes(paramId)
+  }
+
+  getMetadata(paramId: string): ParameterMetadata | undefined {
+    return this.metadata.get(paramId)
+  }
+
+  isAudioParam(paramId: string): boolean {
+    return this.metadata.get(paramId)?.isAudioParam ?? false
+  }
+
+  getAllModulatableParams(): string[] {
+    return Array.from(this.metadata.keys())
+  }
+
+  getModulatableParamsByCategory(category: 'engine' | 'effect'): string[] {
+    return Array.from(this.metadata.entries())
+      .filter(([, meta]) => meta.category === category)
+      .map(([id]) => id)
+  }
+
+  clampValue(paramId: string, value: number): number {
+    const meta = this.metadata.get(paramId)
+    if (!meta) return value
+    return Math.max(meta.min, Math.min(meta.max, value))
+  }
+
+  normalizeValue(paramId: string, value: number): number {
+    const meta = this.metadata.get(paramId)
+    if (!meta) return 0
+
+    if (meta.scaling === 'exponential') {
+      const logMin = Math.log(meta.min)
+      const logMax = Math.log(meta.max)
+      const logValue = Math.log(Math.max(meta.min, value))
+      return (logValue - logMin) / (logMax - logMin)
+    } else {
+      return (value - meta.min) / (meta.max - meta.min)
+    }
+  }
+
+  denormalizeValue(paramId: string, normalized: number): number {
+    const meta = this.metadata.get(paramId)
+    if (!meta) return 0
+
+    const clamped = Math.max(0, Math.min(1, normalized))
+
+    if (meta.scaling === 'exponential') {
+      const logMin = Math.log(meta.min)
+      const logMax = Math.log(meta.max)
+      return Math.exp(logMin + clamped * (logMax - logMin))
+    } else {
+      return meta.min + clamped * (meta.max - meta.min)
+    }
+  }
+}
+
+export const parameterRegistry = new ParameterRegistry()

src/hooks/useKeyboardShortcuts.ts

@@ -0,0 +1,105 @@
+import { useEffect, useRef } from 'react'
+
+export interface KeyboardShortcutHandlers {
+  onSpace?: () => void
+  onArrowUp?: (shift: boolean) => void
+  onArrowDown?: (shift: boolean) => void
+  onArrowLeft?: (shift: boolean) => void
+  onArrowRight?: (shift: boolean) => void
+  onEnter?: () => void
+  onDoubleEnter?: () => void
+  onR?: () => void
+  onShiftR?: () => void
+  onC?: () => void
+  onShiftC?: () => void
+  onEscape?: () => void
+}
+
+const DOUBLE_ENTER_THRESHOLD = 300
+
+export function useKeyboardShortcuts(handlers: KeyboardShortcutHandlers) {
+  const handlersRef = useRef(handlers)
+
+  useEffect(() => {
+    handlersRef.current = handlers
+  }, [handlers])
+
+  useEffect(() => {
+    let lastEnterTime = 0
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.target instanceof HTMLInputElement || e.target instanceof HTMLTextAreaElement) {
+        return
+      }
+
+      const h = handlersRef.current
+
+      switch (e.key) {
+        case ' ':
+          e.preventDefault()
+          h.onSpace?.()
+          break
+
+        case 'ArrowUp':
+          e.preventDefault()
+          h.onArrowUp?.(e.shiftKey)
+          break
+
+        case 'ArrowDown':
+          e.preventDefault()
+          h.onArrowDown?.(e.shiftKey)
+          break
+
+        case 'ArrowLeft':
+          e.preventDefault()
+          h.onArrowLeft?.(e.shiftKey)
+          break
+
+        case 'ArrowRight':
+          e.preventDefault()
+          h.onArrowRight?.(e.shiftKey)
+          break
+
+        case 'Enter': {
+          e.preventDefault()
+          const now = Date.now()
+          if (now - lastEnterTime < DOUBLE_ENTER_THRESHOLD) {
+            h.onDoubleEnter?.()
+          } else {
+            h.onEnter?.()
+          }
+          lastEnterTime = now
+          break
+        }
+
+        case 'r':
+        case 'R':
+          e.preventDefault()
+          if (e.shiftKey) {
+            h.onShiftR?.()
+          } else {
+            h.onR?.()
+          }
+          break
+
+        case 'c':
+        case 'C':
+          e.preventDefault()
+          if (e.shiftKey) {
+            h.onShiftC?.()
+          } else {
+            h.onC?.()
+          }
+          break
+
+        case 'Escape':
+          e.preventDefault()
+          h.onEscape?.()
+          break
+      }
+    }
+
+    window.addEventListener('keydown', handleKeyDown)
+    return () => window.removeEventListener('keydown', handleKeyDown)
+  }, [])
+}

src/hooks/useTileParams.ts

@@ -0,0 +1,33 @@
+import { useCallback } from 'react'
+import type { TileState } from '../types/tiles'
+import { saveTileParams } from '../utils/tileState'
+import { getTileFromGrid, type FocusedTile } from '../utils/tileHelpers'
+
+interface UseTileParamsProps {
+  tiles: TileState[][]
+  setTiles: React.Dispatch<React.SetStateAction<TileState[][]>>
+  customTile: TileState
+  setCustomTile: React.Dispatch<React.SetStateAction<TileState>>
+  focusedTile: FocusedTile
+}
+
+export function useTileParams({ tiles, setTiles, customTile, setCustomTile, focusedTile }: UseTileParamsProps) {
+  const saveCurrentTileParams = useCallback(() => {
+    if (focusedTile === 'custom') {
+      setCustomTile(saveTileParams(customTile))
+    } else {
+      const currentTile = getTileFromGrid(tiles, focusedTile.row, focusedTile.col)
+      if (currentTile) {
+        const updatedTile = saveTileParams(currentTile)
+        setTiles(prevTiles => {
+          const newTiles = [...prevTiles]
+          newTiles[focusedTile.row] = [...newTiles[focusedTile.row]]
+          newTiles[focusedTile.row][focusedTile.col] = updatedTile
+          return newTiles
+        })
+      }
+    }
+  }, [focusedTile, tiles, setTiles, customTile, setCustomTile])
+
+  return { saveCurrentTileParams }
+}

src/lib/bytebeat/BytebeatGenerator.ts

@@ -1,109 +0,0 @@
-import type { BytebeatOptions, BitDepth } from './types'
-import type { EffectValues } from '../../types/effects'
-import { compileFormula } from '../../domain/audio/BytebeatCompiler'
-import { generateSamples } from '../../domain/audio/SampleGenerator'
-import { exportToWav } from '../../domain/audio/WavExporter'
-import { AudioPlayer } from '../../domain/audio/AudioPlayer'
-
-export class BytebeatGenerator {
-  private sampleRate: number
-  private duration: number
-  private audioBuffer: Float32Array | null = null
-  private audioPlayer: AudioPlayer
-
-  constructor(options: BytebeatOptions = {}) {
-    this.sampleRate = options.sampleRate ?? 8000
-    this.duration = options.duration ?? 10
-    this.audioPlayer = new AudioPlayer({ sampleRate: this.sampleRate, duration: this.duration })
-  }
-
-  updateOptions(options: Partial<BytebeatOptions>): void {
-    if (options.sampleRate !== undefined) {
-      this.sampleRate = options.sampleRate
-      this.audioBuffer = null
-    }
-    if (options.duration !== undefined) {
-      this.duration = options.duration
-      this.audioBuffer = null
-    }
-    this.audioPlayer.updateOptions({ sampleRate: this.sampleRate, duration: this.duration })
-  }
-
-  setFormula(formula: string): void {
-    const result = compileFormula(formula)
-
-    if (!result.success || !result.compiledFormula) {
-      throw new Error(`Invalid formula: ${result.error}`)
-    }
-
-    this.audioBuffer = generateSamples(result.compiledFormula, {
-      sampleRate: this.sampleRate,
-      duration: this.duration
-    })
-  }
-
-  generate(): Float32Array {
-    if (!this.audioBuffer) {
-      throw new Error('No formula set. Call setFormula() first.')
-    }
-    return this.audioBuffer
-  }
-
-  setEffects(values: EffectValues): void {
-    this.audioPlayer.setEffects(values)
-  }
-
-  getPlaybackPosition(): number {
-    return this.audioPlayer.getPlaybackPosition()
-  }
-
-  play(): void {
-    if (!this.audioBuffer) {
-      throw new Error('No audio buffer. Call setFormula() first.')
-    }
-    this.audioPlayer.play(this.audioBuffer)
-  }
-
-  onLoopEnd(callback: () => void): void {
-    if (!this.audioBuffer) return
-    this.audioPlayer.setLooping(false)
-    this.audioPlayer.play(this.audioBuffer, callback)
-  }
-
-  setLooping(loop: boolean): void {
-    this.audioPlayer.setLooping(loop)
-  }
-
-  scheduleNextTrack(callback: () => void): void {
-    this.audioPlayer.scheduleNextTrack(callback)
-  }
-
-  pause(): void {
-    this.audioPlayer.pause()
-  }
-
-  stop(): void {
-    this.audioPlayer.stop()
-  }
-
-  exportWAV(bitDepth: BitDepth = 8): Blob {
-    if (!this.audioBuffer) {
-      throw new Error('No audio buffer. Call setFormula() first.')
-    }
-    return exportToWav(this.audioBuffer, { sampleRate: this.sampleRate, bitDepth })
-  }
-
-  downloadWAV(filename: string = 'bytebeat.wav', bitDepth: BitDepth = 8): void {
-    const blob = this.exportWAV(bitDepth)
-    const url = URL.createObjectURL(blob)
-    const a = document.createElement('a')
-    a.href = url
-    a.download = filename
-    a.click()
-    URL.revokeObjectURL(url)
-  }
-
-  dispose(): void {
-    this.audioPlayer.dispose()
-  }
-}

src/lib/bytebeat/EffectsChain.ts

@@ -1,124 +0,0 @@
-import type { EffectValues } from '../../types/effects'
-
-export class EffectsChain {
-  private audioContext: AudioContext
-  private inputNode: GainNode
-  private outputNode: GainNode
-  private masterGainNode: GainNode
-
-  private delayNode: DelayNode
-  private delayFeedbackNode: GainNode
-  private delayWetNode: GainNode
-  private delayDryNode: GainNode
-
-  private convolverNode: ConvolverNode
-  private reverbWetNode: GainNode
-  private reverbDryNode: GainNode
-
-  private tbdNode: GainNode
-
-  constructor(audioContext: AudioContext) {
-    this.audioContext = audioContext
-
-    this.inputNode = audioContext.createGain()
-    this.masterGainNode = audioContext.createGain()
-    this.outputNode = audioContext.createGain()
-
-    this.delayNode = audioContext.createDelay(2.0)
-    this.delayFeedbackNode = audioContext.createGain()
-    this.delayWetNode = audioContext.createGain()
-    this.delayDryNode = audioContext.createGain()
-
-    this.convolverNode = audioContext.createConvolver()
-    this.reverbWetNode = audioContext.createGain()
-    this.reverbDryNode = audioContext.createGain()
-
-    this.tbdNode = audioContext.createGain()
-
-    this.setupChain()
-    this.generateImpulseResponse()
-  }
-
-  private setupChain(): void {
-    this.delayDryNode.gain.value = 1
-    this.delayWetNode.gain.value = 0
-
-    this.inputNode.connect(this.delayDryNode)
-    this.inputNode.connect(this.delayNode)
-    this.delayNode.connect(this.delayFeedbackNode)
-    this.delayFeedbackNode.connect(this.delayNode)
-    this.delayNode.connect(this.delayWetNode)
-
-    this.delayDryNode.connect(this.reverbDryNode)
-    this.delayWetNode.connect(this.reverbDryNode)
-
-    this.delayDryNode.connect(this.convolverNode)
-    this.delayWetNode.connect(this.convolverNode)
-    this.convolverNode.connect(this.reverbWetNode)
-
-    this.reverbDryNode.connect(this.tbdNode)
-    this.reverbWetNode.connect(this.tbdNode)
-
-    this.tbdNode.connect(this.masterGainNode)
-    this.masterGainNode.connect(this.outputNode)
-  }
-
-  private generateImpulseResponse(): void {
-    const length = this.audioContext.sampleRate * 2
-    const impulse = this.audioContext.createBuffer(2, length, this.audioContext.sampleRate)
-    const left = impulse.getChannelData(0)
-    const right = impulse.getChannelData(1)
-
-    for (let i = 0; i < length; i++) {
-      left[i] = (Math.random() * 2 - 1) * Math.pow(1 - i / length, 2)
-      right[i] = (Math.random() * 2 - 1) * Math.pow(1 - i / length, 2)
-    }
-
-    this.convolverNode.buffer = impulse
-  }
-
-  updateEffects(values: EffectValues): void {
-    if (typeof values.reverbWetDry === 'number') {
-      const reverbWet = values.reverbWetDry / 100
-      this.reverbWetNode.gain.value = reverbWet
-      this.reverbDryNode.gain.value = 1 - reverbWet
-    }
-
-    if (typeof values.delayTime === 'number') {
-      this.delayNode.delayTime.value = values.delayTime / 1000
-      const delayAmount = Math.min(values.delayTime / 1000, 0.5)
-      this.delayWetNode.gain.value = delayAmount
-      this.delayDryNode.gain.value = 1 - delayAmount
-    }
-
-    if (typeof values.delayFeedback === 'number') {
-      this.delayFeedbackNode.gain.value = values.delayFeedback / 100
-    }
-
-    if (typeof values.masterVolume === 'number') {
-      this.masterGainNode.gain.value = values.masterVolume / 100
-    }
-  }
-
-  getInputNode(): AudioNode {
-    return this.inputNode
-  }
-
-  getOutputNode(): AudioNode {
-    return this.outputNode
-  }
-
-  dispose(): void {
-    this.inputNode.disconnect()
-    this.outputNode.disconnect()
-    this.masterGainNode.disconnect()
-    this.delayNode.disconnect()
-    this.delayFeedbackNode.disconnect()
-    this.delayWetNode.disconnect()
-    this.delayDryNode.disconnect()
-    this.convolverNode.disconnect()
-    this.reverbWetNode.disconnect()
-    this.reverbDryNode.disconnect()
-    this.tbdNode.disconnect()
-  }
-}

src/lib/bytebeat/index.ts

@@ -1,15 +0,0 @@
-export { BytebeatGenerator } from './BytebeatGenerator'
-export type { BytebeatOptions, BytebeatState, BitDepth } from './types'
-
-export const EXAMPLE_FORMULAS = {
-  classic: 't * ((t>>12)|(t>>8))&(63&(t>>4))',
-  melody: 't>>6^t&0x25|t+(t^t>>11)',
-  simple: 't & (t>>4)|(t>>8)',
-  harmony: '(t>>10&42)*t',
-  glitch: 't*(t>>8*((t>>15)|(t>>8))&(20|(t>>19)*5>>t|(t>>3)))',
-  drums: '((t>>10)&42)*(t>>8)',
-  ambient: '(t*5&t>>7)|(t*3&t>>10)',
-  noise: 't>>6&1?t>>5:-t>>4',
-  arpeggio: 't*(((t>>9)|(t>>13))&25&t>>6)',
-  chaos: 't*(t^t+(t>>15|1))',
-} as const

src/lib/bytebeat/types.ts

@@ -1,12 +0,0 @@
-export interface BytebeatOptions {
-  sampleRate?: number
-  duration?: number
-}
-
-export interface BytebeatState {
-  isPlaying: boolean
-  isPaused: boolean
-  currentTime: number
-}
-
-export type BitDepth = 8 | 16

src/lib/bytebeat/wavEncoder.ts

@@ -1,49 +0,0 @@
-import type { BitDepth } from './types'
-
-function writeString(view: DataView, offset: number, str: string): void {
-  for (let i = 0; i < str.length; i++) {
-    view.setUint8(offset + i, str.charCodeAt(i))
-  }
-}
-
-export function encodeWAV(samples: Float32Array, sampleRate: number, bitDepth: BitDepth): Blob {
-  const numChannels = 1
-  const bytesPerSample = bitDepth / 8
-  const blockAlign = numChannels * bytesPerSample
-  const dataSize = samples.length * bytesPerSample
-  const buffer = new ArrayBuffer(44 + dataSize)
-  const view = new DataView(buffer)
-
-  writeString(view, 0, 'RIFF')
-  view.setUint32(4, 36 + dataSize, true)
-  writeString(view, 8, 'WAVE')
-
-  writeString(view, 12, 'fmt ')
-  view.setUint32(16, 16, true)
-  view.setUint16(20, 1, true)
-  view.setUint16(22, numChannels, true)
-  view.setUint32(24, sampleRate, true)
-  view.setUint32(28, sampleRate * blockAlign, true)
-  view.setUint16(32, blockAlign, true)
-  view.setUint16(34, bitDepth, true)
-
-  writeString(view, 36, 'data')
-  view.setUint32(40, dataSize, true)
-
-  let offset = 44
-  for (let i = 0; i < samples.length; i++) {
-    const sample = Math.max(-1, Math.min(1, samples[i]))
-
-    if (bitDepth === 8) {
-      const value = Math.floor((sample + 1) * 127.5)
-      view.setUint8(offset, value)
-      offset += 1
-    } else {
-      const value = Math.floor(sample * 32767)
-      view.setInt16(offset, value, true)
-      offset += 2
-    }
-  }
-
-  return new Blob([buffer], { type: 'audio/wav' })
-}

src/services/DownloadService.ts

@@ -3,6 +3,7 @@ import { compileFormula } from '../domain/audio/BytebeatCompiler'
 import { generateSamples } from '../domain/audio/SampleGenerator'
 import { exportToWav } from '../domain/audio/WavExporter'
 import type { BitDepth } from '../domain/audio/WavExporter'
+import { DEFAULT_DOWNLOAD_OPTIONS } from '../constants/defaults'
 
 export interface DownloadOptions {
   sampleRate?: number
@@ -24,29 +25,22 @@ export class DownloadService {
     formula: string,
     filename: string,
     options: DownloadOptions = {}
-  ): boolean {
+  ): void {
     const {
-      sampleRate = 8000,
-      duration = 10,
-      bitDepth = 8
+      sampleRate = DEFAULT_DOWNLOAD_OPTIONS.SAMPLE_RATE,
+      duration = DEFAULT_DOWNLOAD_OPTIONS.DURATION,
+      bitDepth = DEFAULT_DOWNLOAD_OPTIONS.BIT_DEPTH
     } = options
 
     const result = compileFormula(formula)
 
     if (!result.success || !result.compiledFormula) {
-      console.error('Failed to compile formula:', result.error)
-      return false
+      throw new Error(`Failed to compile formula: ${result.error}`)
     }
 
-    try {
     const buffer = generateSamples(result.compiledFormula, { sampleRate, duration })
     const blob = exportToWav(buffer, { sampleRate, bitDepth })
     this.downloadBlob(blob, filename)
-      return true
-    } catch (error) {
-      console.error('Failed to download formula:', error)
-      return false
-    }
   }
 
   async downloadAll(
@@ -54,9 +48,9 @@ export class DownloadService {
     options: DownloadOptions = {}
   ): Promise<void> {
     const {
-      sampleRate = 8000,
-      duration = 10,
-      bitDepth = 8
+      sampleRate = DEFAULT_DOWNLOAD_OPTIONS.SAMPLE_RATE,
+      duration = DEFAULT_DOWNLOAD_OPTIONS.DURATION,
+      bitDepth = DEFAULT_DOWNLOAD_OPTIONS.BIT_DEPTH
     } = options
 
     const zip = new JSZip()
@@ -66,17 +60,12 @@ export class DownloadService {
         const result = compileFormula(formula)
 
         if (!result.success || !result.compiledFormula) {
-          console.error(`Failed to compile ${i}_${j}:`, result.error)
-          return
+          throw new Error(`Failed to compile ${i}_${j}: ${result.error}`)
         }
 
-        try {
         const buffer = generateSamples(result.compiledFormula, { sampleRate, duration })
         const blob = exportToWav(buffer, { sampleRate, bitDepth })
         zip.file(`bytebeat_${i}_${j}.wav`, blob)
-        } catch (error) {
-          console.error(`Failed to generate ${i}_${j}:`, error)
-        }
       })
     })
 

src/services/PlaybackManager.ts

@@ -1,7 +1,7 @@
-import { compileFormula } from '../domain/audio/BytebeatCompiler'
-import { generateSamples } from '../domain/audio/SampleGenerator'
 import { AudioPlayer } from '../domain/audio/AudioPlayer'
+import type { LFOWaveform } from '../domain/modulation/LFO'
 import type { EffectValues } from '../types/effects'
+import { DEFAULT_VARIABLES } from '../constants/defaults'
 
 export interface PlaybackOptions {
   sampleRate: number
@@ -11,8 +11,9 @@ export interface PlaybackOptions {
 export class PlaybackManager {
   private player: AudioPlayer
   private currentFormula: string | null = null
-  private currentBuffer: Float32Array | null = null
-  private queuedCallback: (() => void) | null = null
+  private variables: { a: number; b: number; c: number; d: number } = { ...DEFAULT_VARIABLES }
+  private playbackPositionCallback: ((position: number) => void) | null = null
+  private animationFrameId: number | null = null
 
   constructor(options: PlaybackOptions) {
     this.player = new AudioPlayer(options)
@@ -20,51 +21,67 @@ export class PlaybackManager {
 
   async updateOptions(options: Partial<PlaybackOptions>): Promise<void> {
     await this.player.updateOptions(options)
-    this.currentBuffer = null
   }
 
   setEffects(values: EffectValues): void {
     this.player.setEffects(values)
   }
 
+  setVariables(a: number, b: number, c: number, d: number): void {
+    this.variables = { a, b, c, d }
+    this.player.updateRealtimeVariables(a, b, c, d)
+  }
+
+  setLFOConfig(lfoIndex: number, config: { frequency: number; phase: number; waveform: LFOWaveform; mappings: Array<{ targetParam: string; depth: number }> }): void {
+    this.player.setLFOConfig(lfoIndex, config)
+  }
+
   setPitch(pitch: number): void {
-    this.player.setPitch(pitch)
+    this.player.updatePitch(pitch)
   }
 
-  async play(formula: string, sampleRate: number, duration: number): Promise<boolean> {
-    const result = compileFormula(formula)
-
-    if (!result.success || !result.compiledFormula) {
-      console.error('Failed to compile formula:', result.error)
-      return false
+  setPlaybackPositionCallback(callback: (position: number) => void): void {
+    this.playbackPositionCallback = callback
   }
 
-    try {
-      this.currentBuffer = generateSamples(result.compiledFormula, { sampleRate, duration })
+  private startPlaybackTracking(): void {
+    if (this.animationFrameId) {
+      cancelAnimationFrame(this.animationFrameId)
+    }
+
+    const updatePosition = () => {
+      const position = this.player.getPlaybackPosition()
+      if (this.playbackPositionCallback) {
+        this.playbackPositionCallback(position)
+      }
+      this.animationFrameId = requestAnimationFrame(updatePosition)
+    }
+    updatePosition()
+  }
+
+  private stopPlaybackTracking(): void {
+    if (this.animationFrameId) {
+      cancelAnimationFrame(this.animationFrameId)
+      this.animationFrameId = null
+    }
+  }
+
+  async play(formula: string): Promise<void> {
     this.currentFormula = formula
-      this.player.setLooping(true)
-      await this.player.play(this.currentBuffer)
-      return true
-    } catch (error) {
-      console.error('Failed to generate samples:', error)
-      return false
-    }
+    await this.player.playRealtime(
+      formula,
+      this.variables.a,
+      this.variables.b,
+      this.variables.c,
+      this.variables.d
+    )
+    this.startPlaybackTracking()
   }
 
   stop(): void {
+    this.stopPlaybackTracking()
     this.player.stop()
     this.currentFormula = null
-    this.queuedCallback = null
-  }
-
-  scheduleNextTrack(callback: () => void): void {
-    this.queuedCallback = callback
-    this.player.scheduleNextTrack(() => {
-      if (this.queuedCallback) {
-        this.queuedCallback()
-        this.queuedCallback = null
-      }
-    })
   }
 
   getPlaybackPosition(): number {

src/stores/mappingMode.ts

@@ -0,0 +1,34 @@
+import { atom } from 'nanostores'
+
+export interface MappingModeState {
+  isActive: boolean
+  activeLFO: number | null
+}
+
+export const mappingMode = atom<MappingModeState>({
+  isActive: false,
+  activeLFO: null
+})
+
+export function enterMappingMode(lfoIndex: number): void {
+  mappingMode.set({
+    isActive: true,
+    activeLFO: lfoIndex
+  })
+}
+
+export function exitMappingMode(): void {
+  mappingMode.set({
+    isActive: false,
+    activeLFO: null
+  })
+}
+
+export function toggleMappingMode(lfoIndex: number): void {
+  const current = mappingMode.get()
+  if (current.isActive && current.activeLFO === lfoIndex) {
+    exitMappingMode()
+  } else {
+    enterMappingMode(lfoIndex)
+  }
+}

src/stores/settings.ts

@@ -1,15 +1,76 @@
-import { persistentMap } from '@nanostores/persistent'
+import { map } from 'nanostores'
 import { getDefaultEngineValues, getDefaultEffectValues } from '../config/effects'
+import type { LFOWaveform } from '../domain/modulation/LFO'
 
-export const engineSettings = persistentMap('engine:', getDefaultEngineValues(), {
-  encode: JSON.stringify,
-  decode: JSON.parse
-})
+const STORAGE_KEY_ENGINE = 'engine:'
+const STORAGE_KEY_EFFECTS = 'effects:'
+const STORAGE_KEY_LFO = 'lfo:'
 
-export const effectSettings = persistentMap('effects:', {
+export interface LFOMapping {
+  targetParam: string
+  depth: number
+}
+
+export interface LFOConfig {
+  waveform: LFOWaveform
+  frequency: number
+  phase: number
+  mappings: LFOMapping[]
+}
+
+export interface LFOSettings {
+  lfo1: LFOConfig
+  lfo2: LFOConfig
+  lfo3: LFOConfig
+  lfo4: LFOConfig
+}
+
+export function getDefaultLFOConfig(): LFOConfig {
+  return {
+    waveform: 'sine',
+    frequency: 1,
+    phase: 0,
+    mappings: []
+  }
+}
+
+export function getDefaultLFOValues(): LFOSettings {
+  return {
+    lfo1: getDefaultLFOConfig(),
+    lfo2: getDefaultLFOConfig(),
+    lfo3: getDefaultLFOConfig(),
+    lfo4: getDefaultLFOConfig()
+  }
+}
+
+function loadFromStorage<T>(key: string, defaults: T): T {
+  try {
+    const stored = localStorage.getItem(key)
+    return stored ? { ...defaults, ...JSON.parse(stored) } : defaults
+  } catch {
+    return defaults
+  }
+}
+
+export const engineSettings = map(loadFromStorage(STORAGE_KEY_ENGINE, getDefaultEngineValues()))
+
+export const effectSettings = map(loadFromStorage(STORAGE_KEY_EFFECTS, {
   ...getDefaultEffectValues(),
   masterVolume: 75
-}, {
-  encode: JSON.stringify,
-  decode: JSON.parse
-})
+}))
+
+export const lfoSettings = map(loadFromStorage(STORAGE_KEY_LFO, getDefaultLFOValues()))
+
+function saveToStorage() {
+  try {
+    localStorage.setItem(STORAGE_KEY_ENGINE, JSON.stringify(engineSettings.get()))
+    localStorage.setItem(STORAGE_KEY_EFFECTS, JSON.stringify(effectSettings.get()))
+    localStorage.setItem(STORAGE_KEY_LFO, JSON.stringify(lfoSettings.get()))
+  } catch {
+    // Silently fail on storage errors (quota exceeded, private browsing, etc.)
+  }
+}
+
+if (typeof window !== 'undefined') {
+  window.addEventListener('beforeunload', saveToStorage)
+}

src/types/effects.ts

@@ -3,9 +3,10 @@ export interface EffectParameter {
   label: string
   min: number
   max: number
-  default: number
+  default: number | string
   step: number
   unit?: string
+  options?: { value: string; label: string }[]
 }
 
 export interface EffectConfig {
@@ -15,4 +16,4 @@ export interface EffectConfig {
   bypassable?: boolean
 }
 
-export type EffectValues = Record<string, number | boolean>
+export type EffectValues = Record<string, number | boolean | string>

src/types/tiles.ts

@@ -0,0 +1,8 @@
+import type { LFOSettings } from '../stores/settings'
+
+export interface TileState {
+  formula: string
+  engineParams: Record<string, number>
+  effectParams: Record<string, number | boolean | string>
+  lfoConfigs: LFOSettings
+}

src/utils/bytebeatFormulas.ts

@@ -1,3 +1,6 @@
+import type { TileState } from '../types/tiles'
+import { createTileState } from './tileState'
+
 interface Template {
   pattern: string
   weight: number
@@ -69,7 +72,71 @@ const TEMPLATES: Template[] = [
   { pattern: "((t*t)/(t^t>>S))&N", weight: 5 },
   { pattern: "(t*(t>>S1))^(t*(t>>S2))", weight: 6 },
   { pattern: "((t>>S1)*(t>>S2))&((t>>S3)|(t>>S4))", weight: 6 },
-  { pattern: "(t&(t>>S1))^((t>>S2)&(t>>S3))", weight: 5 }
+  { pattern: "(t&(t>>S1))^((t>>S2)&(t>>S3))", weight: 5 },
+
+  { pattern: "t*(a&t>>b)", weight: 6 },
+  { pattern: "(t>>a)|(t>>b)", weight: 6 },
+  { pattern: "t&(t>>a)&(t>>c)", weight: 5 },
+  { pattern: "(t*a)&(t>>b)", weight: 5 },
+  { pattern: "t%(d)+(t>>a)", weight: 5 },
+  { pattern: "(t>>a)^(t>>c)", weight: 5 },
+  { pattern: "t*((t>>a)|(t>>b))&c", weight: 5 },
+  { pattern: "((t>>a)&b)*(t>>c)", weight: 5 },
+  { pattern: "(t&(t>>a))^(t>>d)", weight: 4 },
+  { pattern: "t/(b+(t>>a|t>>c))", weight: 4 },
+
+  { pattern: "t&t>>a", weight: 7 },
+  { pattern: "t&t>>b", weight: 7 },
+  { pattern: "(t*a&t>>b)|(t*c&t>>d)", weight: 9 },
+  { pattern: "(t>>a)&(t>>b)", weight: 6 },
+  { pattern: "t*(a&t>>b)|(t>>c)", weight: 7 },
+  { pattern: "(t*a&t>>S1)|(t*b&t>>S2)", weight: 8 },
+  { pattern: "t&(t>>a)|(t>>b)", weight: 6 },
+  { pattern: "(t*c&t>>a)&(t>>b)", weight: 6 },
+  { pattern: "t*(t>>a&t>>b)", weight: 6 },
+  { pattern: "((t>>a)&N)|(t*b&t>>c)", weight: 7 },
+
+  { pattern: "t&N?(t*a&t>>b):(t>>c)", weight: 7 },
+  { pattern: "(t>>a)&N?(t*b):(t*c)", weight: 7 },
+  { pattern: "t&M?(t>>a|t>>b):(t>>c&t>>d)", weight: 6 },
+  { pattern: "(t>>S)&N?(t*a):(t>>b)", weight: 6 },
+  { pattern: "t%(M)?(t>>a):(t*b&t>>c)", weight: 6 },
+  { pattern: "t&d?(t*a&t>>S):(t>>b)", weight: 6 },
+  { pattern: "(t>>a)&(t>>b)?(t*c):(t>>S)", weight: 5 },
+  { pattern: "t&M?(t>>a)^(t>>b):(t*c)", weight: 5 },
+
+  { pattern: "t*a%(M)", weight: 6 },
+  { pattern: "(t*a)%(M1)+(t*b)%(M2)", weight: 7 },
+  { pattern: "t*a&(t>>b)%(M)", weight: 6 },
+  { pattern: "(t*c%(M))&(t>>a)", weight: 6 },
+  { pattern: "t*a+(t*b&t>>c)", weight: 6 },
+  { pattern: "(t*a&t>>S)+(t*b%(M))", weight: 7 },
+  { pattern: "t*b%(M)*(t>>a)", weight: 6 },
+  { pattern: "(t*a|t*b)&(t>>c)", weight: 6 },
+  { pattern: "t*c&((t>>a)|(t>>b))", weight: 6 },
+  { pattern: "(t*a%(M1))^(t*b%(M2))", weight: 6 },
+
+  { pattern: "(t>>a)^(t>>b)^(t>>c)", weight: 6 },
+  { pattern: "t^(t>>a)^(t*b)", weight: 6 },
+  { pattern: "((t>>a)^(t>>b))&(t*c)", weight: 6 },
+  { pattern: "(t^t>>a)*(t^t>>b)", weight: 6 },
+  { pattern: "t^(t>>a)&(t>>b)&(t>>c)", weight: 5 },
+  { pattern: "((t>>a)^N)*((t>>b)^M)", weight: 6 },
+  { pattern: "(t*a)^(t>>b)^(t>>c)", weight: 6 },
+  { pattern: "t^(t*a>>b)^(t>>c)", weight: 5 },
+  { pattern: "((t^t>>a)&N)|(t>>b)", weight: 5 },
+  { pattern: "(t>>a)^(t*b&t>>c)", weight: 6 },
+
+  { pattern: "((t>>a)&(t>>b))*((t>>c)|(t*d))", weight: 7 },
+  { pattern: "t*((t>>a|t>>b)&(t>>c|t*d))", weight: 7 },
+  { pattern: "(t&(t>>a))*(t%(M))", weight: 6 },
+  { pattern: "t/(D+(t>>a)&(t>>b))", weight: 5 },
+  { pattern: "((t*a)&(t>>b))^((t*c)%(M))", weight: 6 },
+  { pattern: "(t>>a|t*b)&((t>>c)^(t*d))", weight: 6 },
+  { pattern: "t*(t>>a)%(M1)+(t>>b)%(M2)", weight: 7 },
+  { pattern: "((t>>a)%(M))*((t*b)&(t>>c))", weight: 6 },
+  { pattern: "t&((t>>a)|(t*b))^(t>>c)", weight: 6 },
+  { pattern: "(t*a&N)|(t>>b&M)|(t*c)", weight: 7 }
 ]
 
 function randomElement<T>(arr: T[]): T {
@@ -119,9 +186,9 @@ function fillTemplate(pattern: string): string {
 
 function applyParenthesizationRandomization(formula: string): string {
   if (Math.random() < 0.2) {
-    const operators = formula.match(/[\+\-\*\/\&\|\^]/g)
+    const operators = formula.match(/[+\-*/&|^]/g)
     if (operators && operators.length > 0) {
-      const parts = formula.split(/([+\-*\/&|^])/)
+      const parts = formula.split(/([+\-*/&|^])/)
       if (parts.length >= 3) {
         const idx = Math.floor(Math.random() * (parts.length - 2) / 2) * 2
         parts[idx] = `(${parts[idx]})`
@@ -217,3 +284,22 @@ export function generateFormulaGrid(rows: number, cols: number, complexity: numb
   }
   return grid
 }
+
+export function generateTileGrid(rows: number, cols: number, complexity: number = 1): TileState[][] {
+  const grid: TileState[][] = []
+  for (let i = 0; i < rows; i++) {
+    const row: TileState[] = []
+    for (let j = 0; j < cols; j++) {
+      const formula = generateRandomFormula(complexity)
+      const tile = createTileState(formula)
+      tile.engineParams.a = Math.floor(Math.random() * 256)
+      tile.engineParams.b = Math.floor(Math.random() * 256)
+      tile.engineParams.c = Math.floor(Math.random() * 256)
+      tile.engineParams.d = Math.floor(Math.random() * 256)
+      tile.engineParams.pitch = 0.1 + Math.random() * 0.9
+      row.push(tile)
+    }
+    grid.push(row)
+  }
+  return grid
+}

src/utils/formatters.ts

@@ -10,11 +10,6 @@ export function getBitDepthLabel(index: number): string {
   return labels[index] || '8bit'
 }
 
-export function getClipModeLabel(index: number): string {
-  const labels = ['Wrap', 'Clamp', 'Fold']
-  return labels[index] || 'Wrap'
-}
-
 export function getSampleRateLabel(index: number): string {
   return `${SAMPLE_RATES[index]}Hz`
 }

src/utils/tileHelpers.ts

@@ -0,0 +1,20 @@
+import type { TileState } from '../types/tiles'
+
+export type FocusedTile = { row: number; col: number } | 'custom'
+
+export function getTileId(row: number, col: number): string {
+  return `${row}-${col}`
+}
+
+export function isCustomTileFocused(focusedTile: FocusedTile): boolean {
+  return focusedTile === 'custom'
+}
+
+export function isTileFocused(focusedTile: FocusedTile, row: number, col: number): boolean {
+  if (focusedTile === 'custom') return false
+  return focusedTile.row === row && focusedTile.col === col
+}
+
+export function getTileFromGrid(tiles: TileState[][], row: number, col: number): TileState | undefined {
+  return tiles[row]?.[col]
+}

src/utils/tileState.ts

@@ -0,0 +1,180 @@
+import type { TileState } from '../types/tiles'
+import { engineSettings, effectSettings, lfoSettings, getDefaultLFOValues } from '../stores/settings'
+import { getDefaultEngineValues, getDefaultEffectValues, ENGINE_CONTROLS, EFFECTS } from '../config/effects'
+import type { LFOSettings } from '../stores/settings'
+
+export function createTileState(
+  formula: string,
+  engineParams?: Record<string, number>,
+  effectParams?: Record<string, number | boolean | string>,
+  lfoConfigs?: LFOSettings
+): TileState {
+  return {
+    formula,
+    engineParams: engineParams ?? { ...getDefaultEngineValues() },
+    effectParams: effectParams ?? { ...getDefaultEffectValues(), masterVolume: 75 },
+    lfoConfigs: lfoConfigs ?? getDefaultLFOValues()
+  }
+}
+
+export function createTileStateFromCurrent(formula: string): TileState {
+  return {
+    formula,
+    engineParams: { ...engineSettings.get() },
+    effectParams: { ...effectSettings.get() },
+    lfoConfigs: JSON.parse(JSON.stringify(lfoSettings.get()))
+  }
+}
+
+export function loadTileParams(tile: TileState): void {
+  Object.entries(tile.engineParams).forEach(([key, value]) => {
+    engineSettings.setKey(key as keyof ReturnType<typeof getDefaultEngineValues>, value)
+  })
+
+  Object.entries(tile.effectParams).forEach(([key, value]) => {
+    effectSettings.setKey(key as never, value as never)
+  })
+
+  if (tile.lfoConfigs) {
+    Object.entries(tile.lfoConfigs).forEach(([key, value]) => {
+      lfoSettings.setKey(key as keyof LFOSettings, value)
+    })
+  }
+}
+
+export function saveTileParams(tile: TileState): TileState {
+  return {
+    ...tile,
+    engineParams: { ...engineSettings.get() },
+    effectParams: { ...effectSettings.get() },
+    lfoConfigs: JSON.parse(JSON.stringify(lfoSettings.get()))
+  }
+}
+
+export function cloneTileState(tile: TileState): TileState {
+  return {
+    formula: tile.formula,
+    engineParams: { ...tile.engineParams },
+    effectParams: { ...tile.effectParams },
+    lfoConfigs: JSON.parse(JSON.stringify(tile.lfoConfigs))
+  }
+}
+
+function randomInRange(min: number, max: number, step: number): number {
+  const steps = Math.floor((max - min) / step)
+  const randomStep = Math.floor(Math.random() * (steps + 1))
+  return min + randomStep * step
+}
+
+export function randomizeTileParams(tile: TileState): TileState {
+  const randomEngineParams: Record<string, number> = {}
+  const randomEffectParams: Record<string, number | boolean | string> = {}
+
+  ENGINE_CONTROLS.forEach(control => {
+    control.parameters.forEach(param => {
+      if (param.id === 'sampleRate') {
+        randomEngineParams[param.id] = param.max as number
+      } else if (param.id === 'bitDepth') {
+        randomEngineParams[param.id] = param.max as number
+      } else if (param.id === 'pitch') {
+        randomEngineParams[param.id] = 0.1 + Math.random() * 1.4
+      } else if (param.id === 'a' || param.id === 'b' || param.id === 'c' || param.id === 'd') {
+        randomEngineParams[param.id] = Math.floor(Math.random() * 256)
+      } else {
+        randomEngineParams[param.id] = randomInRange(
+          param.min as number,
+          param.max as number,
+          param.step as number
+        )
+      }
+    })
+  })
+
+  const filterModes = ['lowpass', 'highpass']
+  const selectedFilterMode = filterModes[Math.floor(Math.random() * filterModes.length)]
+  const filterFreq = selectedFilterMode === 'lowpass'
+    ? 800 + Math.random() * 4200
+    : 100 + Math.random() * 700
+
+  randomEffectParams['filterMode'] = selectedFilterMode
+  randomEffectParams['filterFreq'] = filterFreq
+
+  EFFECTS.forEach(effect => {
+    effect.parameters.forEach(param => {
+      if (param.id === 'filterMode' || param.id === 'filterFreq') {
+        return
+      }
+
+      if (param.id === 'delayWetDry') {
+        randomEffectParams[param.id] = Math.random() * 50
+      } else if (param.id === 'delayFeedback') {
+        randomEffectParams[param.id] = Math.random() * 90
+      } else if (param.id === 'bitcrushDepth') {
+        randomEffectParams[param.id] = 12 + Math.floor(Math.random() * 5)
+      } else if (param.id === 'bitcrushRate') {
+        randomEffectParams[param.id] = Math.random() * 30
+      } else if (param.options) {
+        const options = param.options
+        const randomOption = options[Math.floor(Math.random() * options.length)]
+        randomEffectParams[param.id] = randomOption.value
+      } else if (typeof param.default === 'boolean') {
+        randomEffectParams[param.id] = Math.random() > 0.5
+      } else {
+        randomEffectParams[param.id] = randomInRange(
+          param.min as number,
+          param.max as number,
+          param.step as number
+        )
+      }
+    })
+
+    if (effect.bypassable) {
+      randomEffectParams[`${effect.id}Bypass`] = Math.random() > 0.5
+    }
+  })
+
+  const modulatableParams = [
+    'filterFreq', 'filterRes',
+    'wavefolderDrive', 'bitcrushDepth', 'bitcrushRate',
+    'delayTime', 'delayFeedback', 'delayWetDry',
+    'reverbWetDry', 'reverbDecay', 'reverbDamping'
+  ]
+
+  const randomLFOConfigs = getDefaultLFOValues()
+  const waveforms: Array<'sine' | 'triangle' | 'square' | 'sawtooth'> = ['sine', 'triangle', 'square', 'sawtooth']
+
+  randomLFOConfigs.lfo1 = {
+    waveform: waveforms[Math.floor(Math.random() * waveforms.length)],
+    frequency: Math.random() * 10,
+    phase: Math.random() * 360,
+    mappings: [{
+      targetParam: 'filterFreq',
+      depth: 20 + Math.random() * 60
+    }]
+  }
+
+  const availableParams = modulatableParams.filter(p => p !== 'filterFreq')
+  const lfoConfigs = [randomLFOConfigs.lfo2, randomLFOConfigs.lfo3, randomLFOConfigs.lfo4]
+
+  lfoConfigs.forEach(config => {
+    if (availableParams.length > 0 && Math.random() > 0.3) {
+      const paramIndex = Math.floor(Math.random() * availableParams.length)
+      const targetParam = availableParams.splice(paramIndex, 1)[0]
+
+      config.waveform = waveforms[Math.floor(Math.random() * waveforms.length)]
+      config.frequency = Math.random() * 10
+      config.phase = Math.random() * 360
+      config.mappings = [{
+        targetParam,
+        depth: 20 + Math.random() * 60
+      }]
+    }
+  })
+
+  return {
+    formula: tile.formula,
+    engineParams: randomEngineParams,
+    effectParams: randomEffectParams,
+    lfoConfigs: randomLFOConfigs
+  }
+}

src/utils/waveformGenerator.ts

@@ -1,6 +1,6 @@
-export function generateWaveformData(formula: string, width: number, sampleRate: number = 8000, duration: number = 0.5): number[] {
+export function generateWaveformData(formula: string, width: number, sampleRate: number = 8000, duration: number = 0.5, a: number = 8, b: number = 16, c: number = 32, d: number = 64): number[] {
   try {
-    const compiledFormula = new Function('t', `return ${formula}`) as (t: number) => number
+    const compiledFormula = new Function('t', 'a', 'b', 'c', 'd', `return ${formula}`) as (t: number, a: number, b: number, c: number, d: number) => number
     const samplesPerPixel = Math.floor((sampleRate * duration) / width)
     const waveform: number[] = []
 
@@ -10,16 +10,11 @@ export function generateWaveformData(formula: string, width: number, sampleRate:
 
       for (let s = 0; s < samplesPerPixel; s++) {
         const t = x * samplesPerPixel + s
-        try {
-          const value = compiledFormula(t)
+        const value = compiledFormula(t, a, b, c, d)
         const byteValue = value & 0xFF
         const normalized = (byteValue - 128) / 128
         min = Math.min(min, normalized)
         max = Math.max(max, normalized)
-        } catch {
-          min = Math.min(min, 0)
-          max = Math.max(max, 0)
-        }
       }
 
       waveform.push(min, max)
@@ -27,7 +22,7 @@ export function generateWaveformData(formula: string, width: number, sampleRate:
 
     return waveform
   } catch {
-    return new Array(width * 2).fill(0)
+    return Array(width * 2).fill(0)
   }
 }