diff --git a/public/worklets/bytebeat-processor.js b/public/worklets/bytebeat-processor.js
new file mode 100644
index 00000000..49296721
--- /dev/null
+++ b/public/worklets/bytebeat-processor.js
@@ -0,0 +1,85 @@
+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.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
+      }
+    }
+  }
+
+  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++
+        if (this.loopLength > 0 && this.t >= this.loopLength) {
+          this.t = 0
+        }
+      }
+    }
+
+    return true
+  }
+}
+
+registerProcessor('bytebeat-processor', BytebeatProcessor)
diff --git a/src/App.tsx b/src/App.tsx
index 42aededb..eece4361 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -7,40 +7,46 @@ import { generateTileGrid, generateRandomFormula } from './utils/bytebeatFormula
 import { BytebeatTile } from './components/BytebeatTile'
 import { EffectsBar } from './components/EffectsBar'
 import { EngineControls } from './components/EngineControls'
+import { FormulaEditor } from './components/FormulaEditor'
 import { getSampleRateFromIndex } from './config/effects'
 import { engineSettings, effectSettings } from './stores/settings'
 import { useKeyboardShortcuts } from './hooks/useKeyboardShortcuts'
+import { useTileParams } from './hooks/useTileParams'
 import type { TileState } from './types/tiles'
-import { createTileStateFromCurrent, loadTileParams, saveTileParams } from './utils/tileState'
+import { createTileStateFromCurrent, loadTileParams } from './utils/tileState'
+import { DEFAULT_VARIABLES, PLAYBACK_ID, TILE_GRID, DEFAULT_DOWNLOAD_OPTIONS } from './constants/defaults'
+import { getTileId, getTileFromGrid, type FocusedTile } from './utils/tileHelpers'
 
 function App() {
   const engineValues = useStore(engineSettings)
   const effectValues = useStore(effectSettings)
 
   const [tiles, setTiles] = useState<TileState[][]>(() =>
-    generateTileGrid(100, 2, engineValues.complexity)
+    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<{ row: number; col: number }>({ row: 0, col: 0 })
+  const [focusedTile, setFocusedTile] = useState<FocusedTile>({ row: 0, col: 0 })
+  const [customTile, setCustomTile] = useState<TileState>(() => createTileStateFromCurrent('t*(8&t>>9)'))
   const playbackManagerRef = useRef<PlaybackManager | null>(null)
   const downloadServiceRef = useRef<DownloadService>(new DownloadService())
-  const animationFrameRef = useRef<number | null>(null)
-  const tilesRef = useRef<TileState[][]>(tiles)
+
+  const { saveCurrentTileParams } = useTileParams({ tiles, setTiles, customTile, setCustomTile, focusedTile })
 
   useEffect(() => {
-    tilesRef.current = tiles
-  }, [tiles])
+    if (playbackManagerRef.current) {
+      playbackManagerRef.current.setPlaybackPositionCallback(setPlaybackPosition)
+    }
+  }, [])
 
   useEffect(() => {
     effectSettings.setKey('masterVolume', engineValues.masterVolume)
   }, [engineValues.masterVolume])
 
   const handleRandom = () => {
-    setTiles(generateTileGrid(100, 2, engineValues.complexity))
+    setTiles(generateTileGrid(TILE_GRID.SIZE, TILE_GRID.COLUMNS, engineValues.complexity))
     setQueued(null)
   }
 
@@ -56,58 +62,42 @@ 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
+    )
 
-    const success = await playbackManagerRef.current.play(formula, sampleRate, duration)
+    const success = await playbackManagerRef.current.play(formula)
 
     if (success) {
       setPlaying(id)
       setQueued(null)
-      startPlaybackTracking()
+      return true
     } else {
       console.error('Failed to play formula')
+      return false
     }
   }
 
-  const startPlaybackTracking = () => {
-    if (animationFrameRef.current) {
-      cancelAnimationFrame(animationFrameRef.current)
-    }
-
-    const updatePosition = () => {
-      if (playbackManagerRef.current) {
-        const position = playbackManagerRef.current.getPlaybackPosition()
-        setPlaybackPosition(position)
-        animationFrameRef.current = requestAnimationFrame(updatePosition)
-      }
-    }
-    updatePosition()
-  }
-
   const handleTileClick = (_formula: string, row: number, col: number, isDoubleClick: boolean = false) => {
-    const id = `${row}-${col}`
-    const tile = tiles[row]?.[col]
+    const id = getTileId(row, col)
+    const tile = getTileFromGrid(tiles, row, col)
 
     if (!tile) return
 
-    if (focusedTile.row !== row || focusedTile.col !== col) {
-      const currentTile = tiles[focusedTile.row]?.[focusedTile.col]
-      if (currentTile) {
-        saveTileParams(currentTile)
-      }
-      loadTileParams(tile)
+    if (focusedTile === 'custom' || (focusedTile.row !== row || focusedTile.col !== col)) {
+      saveCurrentTileParams()
     }
 
+    if (tile) {
+      loadTileParams(tile)
+    }
     setFocusedTile({ row, col })
 
     if (playing === id) {
-      playbackManagerRef.current?.stop()
-      setPlaying(null)
-      setQueued(null)
-      if (animationFrameRef.current) {
-        cancelAnimationFrame(animationFrameRef.current)
-        animationFrameRef.current = null
-      }
+      handleStop()
       return
     }
 
@@ -115,15 +105,6 @@ function App() {
       playFormula(tile.formula, id)
     } else {
       setQueued(id)
-      if (playbackManagerRef.current) {
-        playbackManagerRef.current.scheduleNextTrack(() => {
-          const queuedTile = tilesRef.current[row]?.[col]
-          if (queuedTile) {
-            loadTileParams(queuedTile)
-            playFormula(queuedTile.formula, id)
-          }
-        })
-      }
     }
   }
 
@@ -132,13 +113,9 @@ function App() {
   }
 
 
-  const handleEngineChange = (parameterId: string, value: number) => {
+  const handleEngineChange = async (parameterId: string, value: number) => {
     engineSettings.setKey(parameterId as keyof typeof engineValues, value)
-
-    const currentTile = tiles[focusedTile.row]?.[focusedTile.col]
-    if (currentTile) {
-      saveTileParams(currentTile)
-    }
+    saveCurrentTileParams()
 
     if (parameterId === 'masterVolume' && playbackManagerRef.current) {
       playbackManagerRef.current.setEffects({ ...effectValues, masterVolume: value })
@@ -147,15 +124,21 @@ function App() {
     if (parameterId === 'pitch' && playbackManagerRef.current) {
       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 | string) => {
     effectSettings.setKey(parameterId as any, value as any)
-
-    const currentTile = tiles[focusedTile.row]?.[focusedTile.col]
-    if (currentTile) {
-      saveTileParams(currentTile)
-    }
+    saveCurrentTileParams()
 
     if (playbackManagerRef.current) {
       playbackManagerRef.current.setEffects(effectValues)
@@ -165,59 +148,66 @@ function App() {
   const handleDownloadAll = async () => {
     setDownloading(true)
     const formulas = tiles.map(row => row.map(tile => tile.formula))
-    await downloadServiceRef.current.downloadAll(formulas, { duration: 10, bitDepth: 8 })
+    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(() => {
-        setTiles(prevTiles => {
-          const newTiles = [...prevTiles]
-          newTiles[row] = [...newTiles[row]]
-          newTiles[row][col] = newTile
-          return newTiles
-        })
-        loadTileParams(newTile)
-        playFormula(newTile.formula, id)
-        setRegenerating(null)
-      })
-    } else {
-      setTiles(prevTiles => {
-        const newTiles = [...prevTiles]
-        newTiles[row] = [...newTiles[row]]
-        newTiles[row][col] = newTile
-        return newTiles
-      })
-    }
+    setTiles(prevTiles => {
+      const newTiles = [...prevTiles]
+      newTiles[row] = [...newTiles[row]]
+      newTiles[row][col] = newTile
+      return newTiles
+    })
   }
 
   const handleStop = () => {
     playbackManagerRef.current?.stop()
     setPlaying(null)
     setQueued(null)
-    if (animationFrameRef.current) {
-      cancelAnimationFrame(animationFrameRef.current)
-      animationFrameRef.current = 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) => {
-    const currentTile = tiles[focusedTile.row]?.[focusedTile.col]
-    if (currentTile) {
-      saveTileParams(currentTile)
-    }
+    saveCurrentTileParams()
 
     setFocusedTile(prev => {
+      if (prev === 'custom') return prev
+
       let { row, col } = prev
       const maxRow = tiles.length - 1
       const maxCol = (tiles[row]?.length || 1) - 1
@@ -240,16 +230,17 @@ function App() {
       const newTile = tiles[row]?.[col]
       if (newTile) {
         loadTileParams(newTile)
+        return { row, col }
       }
 
-      return { row, col }
+      return prev
     })
   }
 
   const handleKeyboardSpace = () => {
     if (playing) {
       handleStop()
-    } else {
+    } else if (focusedTile !== 'custom') {
       const tile = tiles[focusedTile.row]?.[focusedTile.col]
       if (tile) {
         handleTileClick(tile.formula, focusedTile.row, focusedTile.col, true)
@@ -258,21 +249,27 @@ function App() {
   }
 
   const handleKeyboardEnter = () => {
-    const tile = tiles[focusedTile.row]?.[focusedTile.col]
-    if (tile) {
-      handleTileClick(tile.formula, focusedTile.row, focusedTile.col, false)
+    if (focusedTile !== 'custom') {
+      const tile = tiles[focusedTile.row]?.[focusedTile.col]
+      if (tile) {
+        handleTileClick(tile.formula, focusedTile.row, focusedTile.col, false)
+      }
     }
   }
 
   const handleKeyboardDoubleEnter = () => {
-    const tile = tiles[focusedTile.row]?.[focusedTile.col]
-    if (tile) {
-      handleTileClick(tile.formula, focusedTile.row, focusedTile.col, true)
+    if (focusedTile !== 'custom') {
+      const tile = tiles[focusedTile.row]?.[focusedTile.col]
+      if (tile) {
+        handleTileClick(tile.formula, focusedTile.row, focusedTile.col, true)
+      }
     }
   }
 
   const handleKeyboardR = () => {
-    handleRegenerate(focusedTile.row, focusedTile.col)
+    if (focusedTile !== 'custom') {
+      handleRegenerate(focusedTile.row, focusedTile.col)
+    }
   }
 
   const handleKeyboardShiftR = () => {
@@ -292,9 +289,11 @@ function App() {
   })
 
   useEffect(() => {
-    const element = document.querySelector(`[data-tile-id="${focusedTile.row}-${focusedTile.col}"]`)
-    if (element) {
-      element.scrollIntoView({ behavior: 'smooth', block: 'nearest' })
+    if (focusedTile !== 'custom') {
+      const element = document.querySelector(`[data-tile-id="${focusedTile.row}-${focusedTile.col}"]`)
+      if (element) {
+        element.scrollIntoView({ behavior: 'smooth', block: 'nearest' })
+      }
     }
   }, [focusedTile])
 
@@ -326,35 +325,50 @@ function App() {
               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"
             >
               <Archive size={14} strokeWidth={2} />
-              {downloading ? 'DOWNLOADING...' : 'DOWNLOAD ALL'}
+              {downloading ? 'DOWNLOADING...' : 'PACK'}
             </button>
           </div>
         </div>
       </header>
 
-      <div className="flex-1 grid grid-cols-2 auto-rows-min gap-[1px] bg-white p-[1px] overflow-auto">
-        {tiles.map((row, i) =>
-          row.map((tile, j) => {
-            const id = `${i}-${j}`
-            return (
-              <BytebeatTile
-                key={id}
-                formula={tile.formula}
-                row={i}
-                col={j}
-                isPlaying={playing === id}
-                isQueued={queued === id}
-                isRegenerating={regenerating === id}
-                isFocused={focusedTile.row === i && focusedTile.col === j}
-                playbackPosition={playing === id ? playbackPosition : 0}
-                onPlay={handleTileClick}
-                onDoubleClick={handleTileDoubleClick}
-                onDownload={handleDownloadFormula}
-                onRegenerate={handleRegenerate}
-              />
-            )
-          })
-        )}
+      <div className="flex-1 flex flex-col overflow-auto bg-white">
+        <div className="grid grid-cols-2 gap-[1px] bg-white p-[1px]">
+          <div className="col-span-2">
+            <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-2 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={tile.formula}
+                  row={i}
+                  col={j}
+                  isPlaying={playing === id}
+                  isQueued={queued === id}
+                  isFocused={focusedTile !== 'custom' && focusedTile.row === i && focusedTile.col === j}
+                  playbackPosition={playing === id ? playbackPosition : 0}
+                  onPlay={handleTileClick}
+                  onDoubleClick={handleTileDoubleClick}
+                  onDownload={handleDownloadFormula}
+                  onRegenerate={handleRegenerate}
+                />
+              )
+            })
+          )}
+        </div>
       </div>
 
       <EffectsBar values={effectValues} onChange={handleEffectChange} />
diff --git a/src/components/BytebeatTile.tsx b/src/components/BytebeatTile.tsx
index e571212d..0a4d4e9c 100644
--- a/src/components/BytebeatTile.tsx
+++ b/src/components/BytebeatTile.tsx
@@ -8,7 +8,6 @@ interface BytebeatTileProps {
   col: number
   isPlaying: boolean
   isQueued: boolean
-  isRegenerating: boolean
   isFocused: boolean
   playbackPosition: number
   onPlay: (formula: string, row: number, col: number) => void
@@ -17,7 +16,7 @@ interface BytebeatTileProps {
   onRegenerate: (row: number, col: number) => void
 }
 
-export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegenerating, isFocused, playbackPosition, onPlay, onDoubleClick, onDownload, onRegenerate }: BytebeatTileProps) {
+export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isFocused, playbackPosition, onPlay, onDoubleClick, onDownload, onRegenerate }: BytebeatTileProps) {
   const canvasRef = useRef<HTMLCanvasElement>(null)
 
   useEffect(() => {
@@ -49,7 +48,7 @@ export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegener
       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'
+        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
@@ -74,7 +73,7 @@ export function BytebeatTile({ formula, row, col, isPlaying, isQueued, isRegener
               : 'bg-white text-black border-white'
           }`}
         >
-          <Dices size={14} strokeWidth={2} className={isRegenerating ? 'animate-spin' : ''} />
+          <Dices size={14} strokeWidth={2} />
         </div>
         <div
           onClick={handleDownload}
diff --git a/src/components/EngineControls.tsx b/src/components/EngineControls.tsx
index 36e4c0b6..42ec6376 100644
--- a/src/components/EngineControls.tsx
+++ b/src/components/EngineControls.tsx
@@ -1,12 +1,15 @@
 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
 }
 
+const KNOB_PARAMS = ['masterVolume', 'a', 'b', 'c', 'd']
+
 export function EngineControls({ values, onChange }: EngineControlsProps) {
   const formatValue = (id: string, value: number): string => {
     switch (id) {
@@ -24,27 +27,48 @@ export function EngineControls({ values, onChange }: EngineControlsProps) {
 
   return (
     <div className="flex items-center gap-6">
-      {ENGINE_CONTROLS[0].parameters.map(param => (
-        <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">
-              {param.label.toUpperCase()}
-            </label>
-            <span className="font-mono text-[9px] text-white">
-              {formatValue(param.id, (values[param.id] as number) ?? param.default)}
-            </span>
+      {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}
+            />
+          )
+        }
+
+        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">
+                {param.label.toUpperCase()}
+              </label>
+              <span className="font-mono text-[9px] text-white">
+                {formatValue(param.id, (values[param.id] as number) ?? param.default)}
+              </span>
+            </div>
+            <input
+              type="range"
+              min={param.min}
+              max={param.max}
+              step={param.step}
+              value={(values[param.id] as number) ?? param.default}
+              onChange={(e) => onChange(param.id, Number(e.target.value))}
+              className="w-full h-[2px] bg-white appearance-none cursor-pointer"
+            />
           </div>
-          <input
-            type="range"
-            min={param.min}
-            max={param.max}
-            step={param.step}
-            value={(values[param.id] as number) ?? param.default}
-            onChange={(e) => onChange(param.id, Number(e.target.value))}
-            className="w-full h-[2px] bg-white appearance-none cursor-pointer"
-          />
-        </div>
-      ))}
+        )
+      })}
     </div>
   )
 }
\ No newline at end of file
diff --git a/src/components/FormulaEditor.tsx b/src/components/FormulaEditor.tsx
new file mode 100644
index 00000000..2b3e53db
--- /dev/null
+++ b/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 ${
+            isPlaying
+              ? 'bg-black text-white border-black'
+              : 'bg-white text-black border-white'
+          }`}
+        >
+          <Play size={12} strokeWidth={2} fill="currentColor" />
+          EVAL
+        </button>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/Knob.tsx b/src/components/Knob.tsx
new file mode 100644
index 00000000..f54df799
--- /dev/null
+++ b/src/components/Knob.tsx
@@ -0,0 +1,118 @@
+import { useRef, useState, useEffect } from 'react'
+
+interface KnobProps {
+  label: string
+  value: number
+  min: number
+  max: number
+  step: number
+  unit?: string
+  onChange: (value: number) => void
+  formatValue?: (id: string, value: number) => string
+  valueId?: string
+  size?: number
+}
+
+export function Knob({
+  label,
+  value,
+  min,
+  max,
+  step,
+  unit,
+  onChange,
+  formatValue,
+  valueId,
+  size = 48
+}: KnobProps) {
+  const [isDragging, setIsDragging] = useState(false)
+  const startYRef = useRef<number>(0)
+  const startValueRef = useRef<number>(0)
+
+  const displayValue = formatValue && valueId ? formatValue(valueId, value) : `${value}${unit || ''}`
+
+  const normalizedValue = (value - min) / (max - min)
+  const angle = -225 + normalizedValue * 270
+
+  const handleMouseDown = (e: React.MouseEvent) => {
+    setIsDragging(true)
+    startYRef.current = e.clientY
+    startValueRef.current = value
+    e.preventDefault()
+  }
+
+  const handleMouseMove = (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)
+  }
+
+  const handleMouseUp = () => {
+    setIsDragging(false)
+  }
+
+  useEffect(() => {
+    if (isDragging) {
+      window.addEventListener('mousemove', handleMouseMove)
+      window.addEventListener('mouseup', handleMouseUp)
+      return () => {
+        window.removeEventListener('mousemove', handleMouseMove)
+        window.removeEventListener('mouseup', handleMouseUp)
+      }
+    }
+  }, [isDragging])
+
+  return (
+    <div className="relative flex flex-col items-center">
+      <div
+        className="relative cursor-ns-resize select-none"
+        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"
+          />
+
+          <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"
+          />
+        </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">
+            {isDragging ? displayValue : label.toUpperCase()}
+          </span>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/config/effects.ts b/src/config/effects.ts
index 58fb1ce0..172fdcfe 100644
--- a/src/config/effects.ts
+++ b/src/config/effects.ts
@@ -43,7 +43,7 @@ export const ENGINE_CONTROLS: EffectConfig[] = [
       },
       {
         id: 'masterVolume',
-        label: 'Volume',
+        label: 'Vol',
         min: 0,
         max: 100,
         default: 75,
@@ -51,13 +51,40 @@ export const ENGINE_CONTROLS: EffectConfig[] = [
         unit: '%'
       },
       {
-        id: 'pitch',
-        label: 'Pitch',
-        min: 0.1,
-        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: ''
       }
     ]
   }
diff --git a/src/constants/defaults.ts b/src/constants/defaults.ts
new file mode 100644
index 00000000..4191dfdc
--- /dev/null
+++ b/src/constants/defaults.ts
@@ -0,0 +1,21 @@
+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: 2
+} as const
+
+export const DEFAULT_DOWNLOAD_OPTIONS = {
+  SAMPLE_RATE: 44100,
+  DURATION: 4,
+  BIT_DEPTH: 24
+} as const
diff --git a/src/domain/audio/AudioPlayer.ts b/src/domain/audio/AudioPlayer.ts
index 7dbf8f32..72a32e55 100644
--- a/src/domain/audio/AudioPlayer.ts
+++ b/src/domain/audio/AudioPlayer.ts
@@ -1,4 +1,5 @@
 import { EffectsChain } from './effects/EffectsChain'
+import { BytebeatSourceEffect } from './effects/BytebeatSourceEffect'
 import type { EffectValues } from '../../types/effects'
 
 export interface AudioPlayerOptions {
@@ -8,15 +9,12 @@ 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 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
 
   constructor(options: AudioPlayerOptions) {
@@ -40,7 +38,7 @@ export class AudioPlayer {
   }
 
   private async recreateAudioContext(): Promise<void> {
-    const wasPlaying = this.sourceNode !== null
+    const wasPlaying = this.bytebeatSource !== null
 
     this.dispose()
 
@@ -61,7 +59,10 @@ export class AudioPlayer {
     if (this.workletRegistered) return
 
     try {
-      await context.audioWorklet.addModule('/worklets/fold-crush-processor.js')
+      await Promise.all([
+        context.audioWorklet.addModule('/worklets/fold-crush-processor.js'),
+        context.audioWorklet.addModule('/worklets/bytebeat-processor.js')
+      ])
       this.workletRegistered = true
     } catch (error) {
       console.error('Failed to register AudioWorklet:', error)
@@ -75,18 +76,7 @@ export class AudioPlayer {
     }
   }
 
-  setPitch(pitch: number): void {
-    this.pitch = pitch
-    if (this.sourceNode && this.audioContext) {
-      this.sourceNode.playbackRate.setTargetAtTime(
-        pitch,
-        this.audioContext.currentTime,
-        0.015
-      )
-    }
-  }
-
-  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)
@@ -97,78 +87,54 @@ export class AudioPlayer {
       await this.effectsChain.initialize(this.audioContext)
       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
-    }
   }
 
-  setLooping(loop: boolean): void {
-    this.isLooping = loop
-    if (this.sourceNode) {
-      this.sourceNode.loop = loop
+  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.reset()
+
+    this.bytebeatSource.getOutputNode().connect(this.effectsChain!.getInputNode())
+    this.effectsChain!.getOutputNode().connect(this.audioContext!.destination)
+
+    this.startTime = this.audioContext!.currentTime
   }
 
-  scheduleNextTrack(callback: () => void): void {
-    if (this.sourceNode) {
-      this.sourceNode.loop = false
-      this.sourceNode.onended = callback
+  updateRealtimeVariables(a: number, b: number, c: number, d: number): void {
+    if (this.bytebeatSource) {
+      this.bytebeatSource.setVariables(a, b, c, d)
     }
   }
 
   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()
     }
     this.startTime = 0
-    this.pauseTime = 0
   }
 
   dispose(): void {
     this.stop()
+    if (this.bytebeatSource) {
+      this.bytebeatSource.dispose()
+      this.bytebeatSource = null
+    }
     if (this.effectsChain) {
       this.effectsChain.dispose()
       this.effectsChain = null
@@ -178,5 +144,6 @@ export class AudioPlayer {
       this.audioContext = null
     }
     this.workletRegistered = false
+    this.startTime = 0
   }
 }
\ No newline at end of file
diff --git a/src/domain/audio/BytebeatCompiler.ts b/src/domain/audio/BytebeatCompiler.ts
index 6903c7b6..e327dda1 100644
--- a/src/domain/audio/BytebeatCompiler.ts
+++ b/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
diff --git a/src/domain/audio/SampleGenerator.ts b/src/domain/audio/SampleGenerator.ts
index 47d718e0..c4a2dc39 100644
--- a/src/domain/audio/SampleGenerator.ts
+++ b/src/domain/audio/SampleGenerator.ts
@@ -3,19 +3,23 @@ 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) {
@@ -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)
 
@@ -40,7 +44,7 @@ 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) {
diff --git a/src/domain/audio/WavExporter.ts b/src/domain/audio/WavExporter.ts
index 22592338..f4ef3eed 100644
--- a/src/domain/audio/WavExporter.ts
+++ b/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
diff --git a/src/domain/audio/effects/BytebeatSourceEffect.ts b/src/domain/audio/effects/BytebeatSourceEffect.ts
new file mode 100644
index 00000000..a5705ba3
--- /dev/null
+++ b/src/domain/audio/effects/BytebeatSourceEffect.ts
@@ -0,0 +1,68 @@
+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> {
+    try {
+      this.processorNode = new AudioWorkletNode(audioContext, 'bytebeat-processor')
+      this.processorNode.connect(this.outputNode)
+    } catch (error) {
+      console.error('Failed to initialize BytebeatSourceEffect worklet:', error)
+    }
+  }
+
+  getInputNode(): AudioNode {
+    return this.inputNode
+  }
+
+  getOutputNode(): AudioNode {
+    return this.outputNode
+  }
+
+  setBypass(_bypass: boolean): void {
+    // Source node doesn't support bypass
+  }
+
+  updateParams(_values: Record<string, number | string>): 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 })
+  }
+
+  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()
+  }
+}
diff --git a/src/hooks/useTileParams.ts b/src/hooks/useTileParams.ts
new file mode 100644
index 00000000..b18073fa
--- /dev/null
+++ b/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 }
+}
diff --git a/src/lib/bytebeat/BytebeatGenerator.ts b/src/lib/bytebeat/BytebeatGenerator.ts
deleted file mode 100644
index b404b459..00000000
--- a/src/lib/bytebeat/BytebeatGenerator.ts
+++ /dev/null
@@ -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()
-  }
-}
\ No newline at end of file
diff --git a/src/lib/bytebeat/EffectsChain.ts b/src/lib/bytebeat/EffectsChain.ts
deleted file mode 100644
index efd5593a..00000000
--- a/src/lib/bytebeat/EffectsChain.ts
+++ /dev/null
@@ -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()
-  }
-}
\ No newline at end of file
diff --git a/src/lib/bytebeat/index.ts b/src/lib/bytebeat/index.ts
deleted file mode 100644
index 1f0d604b..00000000
--- a/src/lib/bytebeat/index.ts
+++ /dev/null
@@ -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
\ No newline at end of file
diff --git a/src/lib/bytebeat/types.ts b/src/lib/bytebeat/types.ts
deleted file mode 100644
index 2f647bc5..00000000
--- a/src/lib/bytebeat/types.ts
+++ /dev/null
@@ -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
\ No newline at end of file
diff --git a/src/lib/bytebeat/wavEncoder.ts b/src/lib/bytebeat/wavEncoder.ts
deleted file mode 100644
index a36faf41..00000000
--- a/src/lib/bytebeat/wavEncoder.ts
+++ /dev/null
@@ -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' })
-}
\ No newline at end of file
diff --git a/src/services/DownloadService.ts b/src/services/DownloadService.ts
index c5388cdc..86f5ef3e 100644
--- a/src/services/DownloadService.ts
+++ b/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
@@ -26,9 +27,9 @@ export class DownloadService {
     options: DownloadOptions = {}
   ): boolean {
     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)
@@ -54,9 +55,9 @@ 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()
diff --git a/src/services/PlaybackManager.ts b/src/services/PlaybackManager.ts
index ea27589b..51ba8850 100644
--- a/src/services/PlaybackManager.ts
+++ b/src/services/PlaybackManager.ts
@@ -1,7 +1,6 @@
-import { compileFormula } from '../domain/audio/BytebeatCompiler'
-import { generateSamples } from '../domain/audio/SampleGenerator'
 import { AudioPlayer } from '../domain/audio/AudioPlayer'
 import type { EffectValues } from '../types/effects'
+import { DEFAULT_VARIABLES } from '../constants/defaults'
 
 export interface PlaybackOptions {
   sampleRate: number
@@ -11,8 +10,10 @@ 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 = { ...DEFAULT_VARIABLES }
+  private playbackPositionCallback: ((position: number) => void) | null = null
+  private animationFrameId: number | null = null
 
   constructor(options: PlaybackOptions) {
     this.player = new AudioPlayer(options)
@@ -20,53 +21,72 @@ 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)
   }
 
-  setPitch(pitch: number): void {
-    this.player.setPitch(pitch)
+  setVariables(a: number, b: number, c: number, d: number): void {
+    this.variables = { a, b, c, d }
+    this.player.updateRealtimeVariables(a, b, c, d)
   }
 
-  async play(formula: string, sampleRate: number, duration: number): Promise<boolean> {
-    const result = compileFormula(formula)
+  setPitch(pitch: number): void {
+    // Pitch is already handled via setEffects, but we could add specific handling here if needed
+  }
 
-    if (!result.success || !result.compiledFormula) {
-      console.error('Failed to compile formula:', result.error)
-      return false
+  setPlaybackPositionCallback(callback: (position: number) => void): void {
+    this.playbackPositionCallback = callback
+  }
+
+  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<boolean> {
     try {
-      this.currentBuffer = generateSamples(result.compiledFormula, { sampleRate, duration })
       this.currentFormula = formula
-      this.player.setLooping(true)
-      await this.player.play(this.currentBuffer)
+      await this.player.playRealtime(
+        formula,
+        this.variables.a,
+        this.variables.b,
+        this.variables.c,
+        this.variables.d
+      )
+      this.startPlaybackTracking()
       return true
     } catch (error) {
-      console.error('Failed to generate samples:', error)
+      console.error('Failed to start realtime playback:', error)
       return false
     }
   }
 
   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 {
     return this.player.getPlaybackPosition()
   }
diff --git a/src/utils/bytebeatFormulas.ts b/src/utils/bytebeatFormulas.ts
index 80f10413..5e4f4193 100644
--- a/src/utils/bytebeatFormulas.ts
+++ b/src/utils/bytebeatFormulas.ts
@@ -72,7 +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 {
diff --git a/src/utils/tileHelpers.ts b/src/utils/tileHelpers.ts
new file mode 100644
index 00000000..d7f7391b
--- /dev/null
+++ b/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]
+}
diff --git a/src/utils/tileState.ts b/src/utils/tileState.ts
index 106c4d81..a6dc924e 100644
--- a/src/utils/tileState.ts
+++ b/src/utils/tileState.ts
@@ -32,9 +32,12 @@ export function loadTileParams(tile: TileState): void {
   })
 }
 
-export function saveTileParams(tile: TileState): void {
-  tile.engineParams = { ...engineSettings.get() }
-  tile.effectParams = { ...effectSettings.get() }
+export function saveTileParams(tile: TileState): TileState {
+  return {
+    ...tile,
+    engineParams: { ...engineSettings.get() },
+    effectParams: { ...effectSettings.get() }
+  }
 }
 
 export function cloneTileState(tile: TileState): TileState {
diff --git a/src/utils/waveformGenerator.ts b/src/utils/waveformGenerator.ts
index 5b6ea35e..c56fb09a 100644
--- a/src/utils/waveformGenerator.ts
+++ b/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[] = []
 
@@ -11,7 +11,7 @@ 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)