From 90f2f4209cd76ae9861ea3722a87c2189b45f36b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rapha=C3=ABl=20Forment?= <raphael.forment@gmail.com>
Date: Mon, 6 Oct 2025 14:31:05 +0200
Subject: [PATCH] Weird hybrid

---
 src/App.tsx                                |  31 ++-
 src/components/controls/EngineControls.tsx |   3 +-
 src/components/modals/HelpModal.tsx        |   4 +
 src/components/ui/Knob.tsx                 |   9 +-
 src/components/ui/Slider.tsx               |  10 +-
 src/config/parameters.ts                   |  16 +-
 src/domain/audio/effects/DelayEffect.ts    | 221 +++++++++++++--------
 src/hooks/useKeyboardShortcuts.ts          |   7 +
 src/hooks/useParameterSync.ts              | 203 ++++++++++++++++++-
 src/hooks/useTileGrid.ts                   |   4 +-
 10 files changed, 405 insertions(+), 103 deletions(-)

diff --git a/src/App.tsx b/src/App.tsx
index 53a48d63..ac0c882e 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,6 +1,6 @@
 import { useState, useRef } from 'react'
 import { useStore } from '@nanostores/react'
-import { Square, Archive, Dices, Sparkles } from 'lucide-react'
+import { Square, Archive, Dices, Sparkles, Blend } from 'lucide-react'
 import { DownloadService } from './services/DownloadService'
 import { generateRandomFormula } from './utils/bytebeatFormulas'
 import { BytebeatTile } from './components/tile/BytebeatTile'
@@ -55,7 +55,7 @@ function App() {
     }
   })
 
-  const { saveCurrentParams, loadParams, handleEngineChange, handleEffectChange, randomizeParams, randomizeAllParams } =
+  const { saveCurrentParams, loadParams, handleEngineChange, handleEffectChange, randomizeParams, randomizeAllParams, interpolateParams } =
     useParameterSync({
       tiles,
       setTiles,
@@ -171,9 +171,18 @@ function App() {
     }
   }
 
+  const handleRegenerate = (row: number, col: number) => {
+    const newTile = regenerateTile(row, col)
+    const tileId = getTileId(row, col)
+
+    if (playing === tileId) {
+      play(newTile.formula, tileId, newTile)
+    }
+  }
+
   const handleKeyboardR = () => {
     if (focusedTile !== 'custom') {
-      regenerateTile(focusedTile.row, focusedTile.col)
+      handleRegenerate(focusedTile.row, focusedTile.col)
     }
   }
 
@@ -200,6 +209,7 @@ function App() {
     onShiftR: handleRandom,
     onC: handleKeyboardC,
     onShiftC: randomizeAllParams,
+    onI: interpolateParams,
     onEscape: exitMappingMode
   })
 
@@ -296,6 +306,12 @@ function App() {
               >
                 <Sparkles size={12} strokeWidth={2} className="mx-auto" />
               </button>
+              <button
+                onClick={interpolateParams}
+                className="flex-1 px-2 py-2 bg-white text-black font-mono text-[9px] tracking-[0.2em] hover:bg-black hover:text-white border-2 border-white transition-all"
+              >
+                <Blend size={12} strokeWidth={2} className="mx-auto" />
+              </button>
               <button
                 onClick={handleDownloadAll}
                 disabled={downloading}
@@ -390,6 +406,13 @@ function App() {
               <Sparkles size={12} strokeWidth={2} />
               CHAOS
             </button>
+            <button
+              onClick={interpolateParams}
+              className="px-4 py-2 bg-white text-black font-mono text-[10px] tracking-[0.2em] hover:bg-black hover:text-white border-2 border-white transition-all flex items-center gap-1"
+            >
+              <Blend size={12} strokeWidth={2} />
+              MORPH
+            </button>
             <button
               onClick={handleDownloadAll}
               disabled={downloading}
@@ -442,7 +465,7 @@ function App() {
                   onPlay={handleTileClick}
                   onDoubleClick={handleTileDoubleClick}
                   onDownload={handleDownloadFormula}
-                  onRegenerate={regenerateTile}
+                  onRegenerate={handleRegenerate}
                 />
               )
             })
diff --git a/src/components/controls/EngineControls.tsx b/src/components/controls/EngineControls.tsx
index baba7712..8aeb343b 100644
--- a/src/components/controls/EngineControls.tsx
+++ b/src/components/controls/EngineControls.tsx
@@ -31,7 +31,8 @@ export function EngineControls({ values, onChange, onMapClick, getMappedLFOs, sh
         return getAlgorithmLabel(value)
       default: {
         const param = ENGINE_CONTROLS[0].parameters.find(p => p.id === id)
-        return `${value}${param?.unit || ''}`
+        const formattedValue = Number.isInteger(value) ? value.toString() : value.toFixed(1)
+        return `${formattedValue}${param?.unit || ''}`
       }
     }
   }
diff --git a/src/components/modals/HelpModal.tsx b/src/components/modals/HelpModal.tsx
index 3d4bff9a..d64ccec8 100644
--- a/src/components/modals/HelpModal.tsx
+++ b/src/components/modals/HelpModal.tsx
@@ -77,6 +77,10 @@ export function HelpModal({ onClose, showStartButton = false }: HelpModalProps)
                   <td className="p-2 md:p-3 border-r border-white">SHIFT + C</td>
                   <td className="p-2 md:p-3">Randomize all params (CHAOS)</td>
                 </tr>
+                <tr className="border-b border-white">
+                  <td className="p-2 md:p-3 border-r border-white">I</td>
+                  <td className="p-2 md:p-3">Interpolate params (MORPH)</td>
+                </tr>
                 <tr>
                   <td className="p-2 md:p-3 border-r border-white">ESC</td>
                   <td className="p-2 md:p-3">Exit mapping mode</td>
diff --git a/src/components/ui/Knob.tsx b/src/components/ui/Knob.tsx
index 56b6bff1..2d6305bc 100644
--- a/src/components/ui/Knob.tsx
+++ b/src/components/ui/Knob.tsx
@@ -38,7 +38,14 @@ export function Knob({
   const startValueRef = useRef<number>(0)
   const mappingModeState = useStore(mappingMode)
 
-  const displayValue = formatValue && valueId ? formatValue(valueId, value) : `${value}${unit || ''}`
+  const formatNumber = (num: number) => {
+    if (Number.isInteger(num)) return num.toString()
+    return num.toFixed(1)
+  }
+
+  const displayValue = formatValue && valueId
+    ? formatValue(valueId, value)
+    : `${formatNumber(value)}${unit || ''}`
   const isInMappingMode = mappingModeState.isActive && paramId
   const hasMappings = mappedLFOs.length > 0
 
diff --git a/src/components/ui/Slider.tsx b/src/components/ui/Slider.tsx
index 1f5eaa22..c9631a25 100644
--- a/src/components/ui/Slider.tsx
+++ b/src/components/ui/Slider.tsx
@@ -31,7 +31,15 @@ export function Slider({
   mappedLFOs = []
 }: SliderProps) {
   const mappingModeState = useStore(mappingMode)
-  const displayValue = formatValue && valueId ? formatValue(valueId, value) : `${value}${unit || ''}`
+
+  const formatNumber = (num: number) => {
+    if (Number.isInteger(num)) return num.toString()
+    return num.toFixed(1)
+  }
+
+  const displayValue = formatValue && valueId
+    ? formatValue(valueId, value)
+    : `${formatNumber(value)}${unit || ''}`
   const isInMappingMode = !!(mappingModeState.isActive && paramId)
   const hasMappings = mappedLFOs.length > 0
 
diff --git a/src/config/parameters.ts b/src/config/parameters.ts
index a01d903a..4d8d6e90 100644
--- a/src/config/parameters.ts
+++ b/src/config/parameters.ts
@@ -217,8 +217,8 @@ export const EFFECTS: ParameterGroup[] = [
         id: 'delayTime',
         label: 'Time',
         min: 10,
-        max: 2000,
-        default: 250,
+        max: 10000,
+        default: 500,
         step: 10,
         unit: 'ms'
       },
@@ -250,20 +250,20 @@ export const EFFECTS: ParameterGroup[] = [
         unit: '%'
       },
       {
-        id: 'delaySaturation',
-        label: 'Saturation',
+        id: 'delayPingPong',
+        label: 'Ping-Pong',
         min: 0,
         max: 100,
-        default: 20,
+        default: 0,
         step: 1,
         unit: '%'
       },
       {
-        id: 'delayFlutter',
-        label: 'Flutter',
+        id: 'delayDiffusion',
+        label: 'Diffusion',
         min: 0,
         max: 100,
-        default: 15,
+        default: 0,
         step: 1,
         unit: '%'
       }
diff --git a/src/domain/audio/effects/DelayEffect.ts b/src/domain/audio/effects/DelayEffect.ts
index e6674538..293eb1bc 100644
--- a/src/domain/audio/effects/DelayEffect.ts
+++ b/src/domain/audio/effects/DelayEffect.ts
@@ -6,71 +6,118 @@ export class DelayEffect implements Effect {
   private audioContext: AudioContext
   private inputNode: GainNode
   private outputNode: GainNode
-  private delayNode: DelayNode
-  private feedbackNode: GainNode
-  private wetNode: GainNode
   private dryNode: GainNode
+  private wetNode: GainNode
+
+  private leftDelayNode: DelayNode
+  private rightDelayNode: DelayNode
+  private leftFeedbackNode: GainNode
+  private rightFeedbackNode: GainNode
+
   private filterNode: BiquadFilterNode
-  private saturatorNode: WaveShaperNode
-  private lfoNode: OscillatorNode
-  private lfoGainNode: GainNode
+  private dcBlockerNode: BiquadFilterNode
+
+  private splitterNode: ChannelSplitterNode
+  private mergerNode: ChannelMergerNode
+
+  private diffusionNodes: BiquadFilterNode[] = []
+  private diffusionMixNode: GainNode
+  private diffusionWetNode: GainNode
+  private diffusionDryNode: GainNode
+
   private bypassed: boolean = false
   private currentWetValue: number = 0.5
   private currentDryValue: number = 0.5
+  private currentPingPong: number = 0
 
   constructor(audioContext: AudioContext) {
     this.audioContext = audioContext
+
     this.inputNode = audioContext.createGain()
     this.outputNode = audioContext.createGain()
-    this.delayNode = audioContext.createDelay(2.0)
-    this.feedbackNode = audioContext.createGain()
-    this.wetNode = audioContext.createGain()
     this.dryNode = audioContext.createGain()
-    this.filterNode = audioContext.createBiquadFilter()
-    this.saturatorNode = audioContext.createWaveShaper()
+    this.wetNode = audioContext.createGain()
 
-    this.delayNode.delayTime.value = 0.25
+    this.splitterNode = audioContext.createChannelSplitter(2)
+    this.mergerNode = audioContext.createChannelMerger(2)
+
+    this.leftDelayNode = audioContext.createDelay(11)
+    this.rightDelayNode = audioContext.createDelay(11)
+    this.leftFeedbackNode = audioContext.createGain()
+    this.rightFeedbackNode = audioContext.createGain()
+
+    this.filterNode = audioContext.createBiquadFilter()
+    this.dcBlockerNode = audioContext.createBiquadFilter()
+
+    this.diffusionMixNode = audioContext.createGain()
+    this.diffusionWetNode = audioContext.createGain()
+    this.diffusionDryNode = audioContext.createGain()
+
+    this.leftDelayNode.delayTime.value = 0.5
+    this.rightDelayNode.delayTime.value = 0.5
+    this.leftFeedbackNode.gain.value = 0.5
+    this.rightFeedbackNode.gain.value = 0.5
     this.dryNode.gain.value = 0.5
     this.wetNode.gain.value = 0.5
-    this.feedbackNode.gain.value = 0.5
 
     this.filterNode.type = 'lowpass'
     this.filterNode.frequency.value = 5000
     this.filterNode.Q.value = 0.7
 
-    this.createSaturationCurve(0.2)
+    this.dcBlockerNode.type = 'highpass'
+    this.dcBlockerNode.frequency.value = 5
+    this.dcBlockerNode.Q.value = 0.707
 
-    this.lfoNode = audioContext.createOscillator()
-    this.lfoGainNode = audioContext.createGain()
-    this.lfoNode.frequency.value = 2.5
-    this.lfoGainNode.gain.value = 0.0015
-    this.lfoNode.connect(this.lfoGainNode)
-    this.lfoGainNode.connect(this.delayNode.delayTime)
-    this.lfoNode.start()
+    this.diffusionWetNode.gain.value = 0
+    this.diffusionDryNode.gain.value = 1
 
-    this.inputNode.connect(this.dryNode)
-    this.inputNode.connect(this.delayNode)
-    this.delayNode.connect(this.saturatorNode)
-    this.saturatorNode.connect(this.filterNode)
-    this.filterNode.connect(this.feedbackNode)
-    this.feedbackNode.connect(this.delayNode)
-    this.delayNode.connect(this.wetNode)
-    this.dryNode.connect(this.outputNode)
-    this.wetNode.connect(this.outputNode)
-  }
-
-  private createSaturationCurve(amount: number): void {
-    const samples = 2048
-    const curve = new Float32Array(samples)
-    const drive = 1 + amount * 9
-
-    for (let i = 0; i < samples; i++) {
-      const x = (i * 2) / samples - 1
-      curve[i] = Math.tanh(x * drive) / Math.tanh(drive)
+    const diffusionDelays = [5.3, 11.7, 19.3, 29.1]
+    for (let i = 0; i < diffusionDelays.length; i++) {
+      const allpass = audioContext.createBiquadFilter()
+      allpass.type = 'allpass'
+      allpass.frequency.value = 1000 / (diffusionDelays[i] / 1000)
+      allpass.Q.value = 0.707
+      this.diffusionNodes.push(allpass)
     }
 
-    this.saturatorNode.curve = curve
-    this.saturatorNode.oversample = '2x'
+    this.setupRouting()
+  }
+
+  private setupRouting(): void {
+    this.inputNode.connect(this.dryNode)
+    this.dryNode.connect(this.outputNode)
+
+    this.inputNode.connect(this.splitterNode)
+    this.splitterNode.connect(this.leftDelayNode, 0)
+    this.splitterNode.connect(this.rightDelayNode, 1)
+
+    this.leftDelayNode.connect(this.filterNode)
+    this.filterNode.connect(this.dcBlockerNode)
+    this.dcBlockerNode.connect(this.diffusionMixNode)
+
+    this.diffusionMixNode.connect(this.diffusionDryNode)
+    this.diffusionMixNode.connect(this.diffusionNodes[0])
+
+    let lastNode: AudioNode = this.diffusionNodes[0]
+    for (let i = 1; i < this.diffusionNodes.length; i++) {
+      lastNode.connect(this.diffusionNodes[i])
+      lastNode = this.diffusionNodes[i]
+    }
+    lastNode.connect(this.diffusionWetNode)
+
+    this.diffusionDryNode.connect(this.leftFeedbackNode)
+    this.diffusionWetNode.connect(this.leftFeedbackNode)
+    this.leftFeedbackNode.connect(this.rightDelayNode)
+
+    this.rightDelayNode.connect(this.rightFeedbackNode)
+    this.rightFeedbackNode.connect(this.leftDelayNode)
+
+    this.diffusionDryNode.connect(this.mergerNode, 0, 0)
+    this.diffusionWetNode.connect(this.mergerNode, 0, 0)
+    this.rightDelayNode.connect(this.mergerNode, 0, 1)
+
+    this.mergerNode.connect(this.wetNode)
+    this.wetNode.connect(this.outputNode)
   }
 
   getInputNode(): AudioNode {
@@ -86,27 +133,39 @@ export class DelayEffect implements Effect {
     if (bypass) {
       this.wetNode.gain.value = 0
       this.dryNode.gain.value = 1
+      this.leftFeedbackNode.disconnect()
+      this.rightFeedbackNode.disconnect()
     } else {
       this.wetNode.gain.value = this.currentWetValue
       this.dryNode.gain.value = this.currentDryValue
+      this.leftFeedbackNode.disconnect()
+      this.rightFeedbackNode.disconnect()
+      this.leftFeedbackNode.connect(this.rightDelayNode)
+      this.rightFeedbackNode.connect(this.leftDelayNode)
     }
   }
 
   updateParams(values: Record<string, number | string>): void {
+    const now = this.audioContext.currentTime
+
     if (values.delayTime !== undefined && typeof values.delayTime === 'number') {
       const time = values.delayTime / 1000
-      this.delayNode.delayTime.setTargetAtTime(
-        time,
-        this.audioContext.currentTime,
-        0.01
-      )
+      this.leftDelayNode.delayTime.setTargetAtTime(time, now, 0.01)
+      this.rightDelayNode.delayTime.setTargetAtTime(time, now, 0.01)
     }
 
     if (values.delayFeedback !== undefined && typeof values.delayFeedback === 'number') {
       const feedback = values.delayFeedback / 100
-      this.feedbackNode.gain.setTargetAtTime(
-        feedback * 0.95,
-        this.audioContext.currentTime,
+      const pingPongFactor = Math.max(0.5, this.currentPingPong / 100)
+
+      this.leftFeedbackNode.gain.setTargetAtTime(
+        feedback * 0.95 * pingPongFactor,
+        now,
+        0.01
+      )
+      this.rightFeedbackNode.gain.setTargetAtTime(
+        feedback * 0.95 * pingPongFactor,
+        now,
         0.01
       )
     }
@@ -117,57 +176,51 @@ export class DelayEffect implements Effect {
       this.currentDryValue = 1 - wet
 
       if (!this.bypassed) {
-        this.wetNode.gain.setTargetAtTime(
-          this.currentWetValue,
-          this.audioContext.currentTime,
-          0.01
-        )
-        this.dryNode.gain.setTargetAtTime(
-          this.currentDryValue,
-          this.audioContext.currentTime,
-          0.01
-        )
+        this.wetNode.gain.setTargetAtTime(this.currentWetValue, now, 0.01)
+        this.dryNode.gain.setTargetAtTime(this.currentDryValue, now, 0.01)
       }
     }
 
     if (values.delayTone !== undefined && typeof values.delayTone === 'number') {
       const tone = values.delayTone / 100
       const freq = 200 + tone * 7800
-      this.filterNode.frequency.setTargetAtTime(
-        freq,
-        this.audioContext.currentTime,
-        0.01
-      )
+      this.filterNode.frequency.setTargetAtTime(freq, now, 0.01)
     }
 
-    if (values.delaySaturation !== undefined && typeof values.delaySaturation === 'number') {
-      const saturation = values.delaySaturation / 100
-      this.createSaturationCurve(saturation)
+    if (values.delayPingPong !== undefined && typeof values.delayPingPong === 'number') {
+      this.currentPingPong = values.delayPingPong
     }
 
-    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
-      this.lfoGainNode.gain.setTargetAtTime(
-        modDepth,
-        this.audioContext.currentTime,
-        0.01
-      )
+    if (values.delayDiffusion !== undefined && typeof values.delayDiffusion === 'number') {
+      const diffusion = values.delayDiffusion / 100
+      this.diffusionWetNode.gain.setTargetAtTime(diffusion, now, 0.01)
+      this.diffusionDryNode.gain.setTargetAtTime(1 - diffusion, now, 0.01)
+
+      for (const filter of this.diffusionNodes) {
+        filter.Q.setTargetAtTime(0.707 + diffusion * 4, now, 0.01)
+      }
     }
   }
 
   dispose(): void {
-    this.lfoNode.stop()
-    this.lfoNode.disconnect()
-    this.lfoGainNode.disconnect()
     this.inputNode.disconnect()
     this.outputNode.disconnect()
-    this.delayNode.disconnect()
-    this.feedbackNode.disconnect()
-    this.wetNode.disconnect()
     this.dryNode.disconnect()
+    this.wetNode.disconnect()
+    this.leftDelayNode.disconnect()
+    this.rightDelayNode.disconnect()
+    this.leftFeedbackNode.disconnect()
+    this.rightFeedbackNode.disconnect()
     this.filterNode.disconnect()
-    this.saturatorNode.disconnect()
+    this.dcBlockerNode.disconnect()
+    this.splitterNode.disconnect()
+    this.mergerNode.disconnect()
+    this.diffusionMixNode.disconnect()
+    this.diffusionWetNode.disconnect()
+    this.diffusionDryNode.disconnect()
+
+    for (const filter of this.diffusionNodes) {
+      filter.disconnect()
+    }
   }
 }
diff --git a/src/hooks/useKeyboardShortcuts.ts b/src/hooks/useKeyboardShortcuts.ts
index 8b4cad8f..36d84cd9 100644
--- a/src/hooks/useKeyboardShortcuts.ts
+++ b/src/hooks/useKeyboardShortcuts.ts
@@ -12,6 +12,7 @@ export interface KeyboardShortcutHandlers {
   onShiftR?: () => void
   onC?: () => void
   onShiftC?: () => void
+  onI?: () => void
   onEscape?: () => void
 }
 
@@ -92,6 +93,12 @@ export function useKeyboardShortcuts(handlers: KeyboardShortcutHandlers) {
           }
           break
 
+        case 'i':
+        case 'I':
+          e.preventDefault()
+          h.onI?.()
+          break
+
         case 'Escape':
           e.preventDefault()
           h.onEscape?.()
diff --git a/src/hooks/useParameterSync.ts b/src/hooks/useParameterSync.ts
index cabecdb3..62f4a592 100644
--- a/src/hooks/useParameterSync.ts
+++ b/src/hooks/useParameterSync.ts
@@ -1,11 +1,13 @@
-import { useCallback } from 'react'
+import { useCallback, useRef } from 'react'
 import type { TileState } from '../types/tiles'
 import type { FocusedTile } from '../utils/tileHelpers'
-import { engineSettings, effectSettings } from '../stores/settings'
+import { engineSettings, effectSettings, lfoSettings } from '../stores/settings'
 import { loadTileParams, saveTileParams, randomizeTileParams } from '../utils/tileState'
 import { getTileFromGrid } from '../utils/tileHelpers'
 import { DEFAULT_VARIABLES } from '../constants/defaults'
 import type { PlaybackManager } from '../services/PlaybackManager'
+import { ENGINE_CONTROLS, EFFECTS } from '../config/parameters'
+import type { LFOWaveform } from '../domain/modulation/LFO'
 
 interface UseParameterSyncProps {
   tiles: TileState[][]
@@ -28,6 +30,7 @@ export function useParameterSync({
   playing,
   playbackId
 }: UseParameterSyncProps) {
+  const interpolationRef = useRef<number | null>(null)
 
   const saveCurrentParams = useCallback(() => {
     if (focusedTile === 'custom') {
@@ -201,12 +204,206 @@ export function useParameterSync({
     }
   }, [playing, playbackId, setCustomTile, setTiles, focusedTile, playbackManager])
 
+  const interpolateParams = useCallback(() => {
+    if (interpolationRef.current !== null) {
+      return
+    }
+
+    const startTime = Date.now()
+    const currentEngine = engineSettings.get()
+    const currentEffect = effectSettings.get()
+    const currentLFOs = lfoSettings.get()
+
+    interface ParamTransition {
+      start: number
+      end: number
+      duration: number
+      paramId: string
+      paramType: 'engine' | 'effect' | 'lfo'
+      isBoolean?: boolean
+      isString?: boolean
+      isInteger?: boolean
+      lfoIndex?: number
+    }
+
+    const transitions: ParamTransition[] = []
+
+    EFFECTS.forEach(effect => {
+      if (effect.bypassable) {
+        const bypassKey = `${effect.id}Bypass`
+        const targetBypass = Math.random() > 0.5
+        setTimeout(() => {
+          handleEffectChange(bypassKey, targetBypass)
+        }, 500 + Math.random() * 4500)
+      }
+    })
+
+    const waveforms: LFOWaveform[] = ['sine', 'triangle', 'square', 'sawtooth']
+    const lfoKeys = ['lfo1', 'lfo2', 'lfo3', 'lfo4'] as const
+    lfoKeys.forEach((lfoKey, index) => {
+      const currentLFO = currentLFOs[lfoKey]
+      const targetFrequency = Math.random() * 10
+
+      transitions.push({
+        start: currentLFO.frequency,
+        end: targetFrequency,
+        duration: 500 + Math.random() * 4500,
+        paramId: 'frequency',
+        paramType: 'lfo',
+        lfoIndex: index
+      })
+
+      const targetWaveform = waveforms[Math.floor(Math.random() * waveforms.length)]
+      const targetPhase = Math.random() * 360
+      setTimeout(() => {
+        if (playbackManager.current) {
+          const updatedLFO = {
+            ...currentLFO,
+            waveform: targetWaveform,
+            phase: targetPhase,
+            frequency: targetFrequency
+          }
+          lfoSettings.setKey(lfoKey, updatedLFO)
+          playbackManager.current.setLFOConfig(index, updatedLFO)
+        }
+      }, 500 + Math.random() * 4500)
+    })
+
+    ENGINE_CONTROLS.forEach(control => {
+      control.parameters.forEach(param => {
+        const currentValue = currentEngine[param.id as keyof typeof currentEngine] as number
+        let targetValue: number
+        const isIntegerParam = param.step === 1 && Number.isInteger(param.min as number)
+
+        if (param.id === 'sampleRate' || param.id === 'bitDepth') {
+          return
+        } else if (param.id === 'pitch') {
+          targetValue = 0.1 + Math.random() * 1.4
+        } else if (param.id === 'a' || param.id === 'b' || param.id === 'c' || param.id === 'd') {
+          targetValue = Math.floor(Math.random() * 256)
+        } else {
+          const range = (param.max as number) - (param.min as number)
+          targetValue = (param.min as number) + Math.random() * range
+        }
+
+        transitions.push({
+          start: currentValue,
+          end: targetValue,
+          duration: 500 + Math.random() * 4500,
+          paramId: param.id,
+          paramType: 'engine',
+          isInteger: isIntegerParam
+        })
+      })
+    })
+
+    EFFECTS.forEach(effect => {
+      effect.parameters.forEach(param => {
+        const currentValue = currentEffect[param.id as keyof typeof currentEffect]
+        const isIntegerParam = param.step === 1 && Number.isInteger(param.min as number)
+
+        if (param.options) {
+          const options = param.options
+          const randomOption = options[Math.floor(Math.random() * options.length)]
+          transitions.push({
+            start: 0,
+            end: 0,
+            duration: 500 + Math.random() * 4500,
+            paramId: param.id,
+            paramType: 'effect',
+            isString: true
+          })
+          setTimeout(() => {
+            handleEffectChange(param.id, randomOption.value)
+          }, 500 + Math.random() * 4500)
+        } else if (typeof param.default === 'boolean') {
+          const targetValue = Math.random() > 0.5
+          transitions.push({
+            start: 0,
+            end: 0,
+            duration: 500 + Math.random() * 4500,
+            paramId: param.id,
+            paramType: 'effect',
+            isBoolean: true
+          })
+          setTimeout(() => {
+            handleEffectChange(param.id, targetValue)
+          }, 500 + Math.random() * 4500)
+        } else {
+          const range = (param.max as number) - (param.min as number)
+          const targetValue = (param.min as number) + Math.random() * range
+
+          transitions.push({
+            start: currentValue as number,
+            end: targetValue,
+            duration: 500 + Math.random() * 4500,
+            paramId: param.id,
+            paramType: 'effect',
+            isInteger: isIntegerParam
+          })
+        }
+      })
+    })
+
+    const animate = () => {
+      const elapsed = Date.now() - startTime
+      let allComplete = true
+
+      transitions.forEach(transition => {
+        if (transition.isBoolean || transition.isString) {
+          return
+        }
+
+        const progress = Math.min(elapsed / transition.duration, 1)
+        const eased = progress < 0.5
+          ? 2 * progress * progress
+          : 1 - Math.pow(-2 * progress + 2, 2) / 2
+
+        let currentValue = transition.start + (transition.end - transition.start) * eased
+
+        if (transition.isInteger) {
+          currentValue = Math.round(currentValue)
+        }
+
+        if (transition.paramType === 'engine') {
+          handleEngineChange(transition.paramId, currentValue)
+        } else if (transition.paramType === 'effect') {
+          handleEffectChange(transition.paramId, currentValue)
+        } else if (transition.paramType === 'lfo' && transition.lfoIndex !== undefined) {
+          if (playbackManager.current) {
+            const lfoKey = ['lfo1', 'lfo2', 'lfo3', 'lfo4'][transition.lfoIndex] as 'lfo1' | 'lfo2' | 'lfo3' | 'lfo4'
+            const currentLFO = lfoSettings.get()[lfoKey]
+            const updatedLFO = {
+              ...currentLFO,
+              frequency: currentValue
+            }
+            lfoSettings.setKey(lfoKey, updatedLFO)
+            playbackManager.current.setLFOConfig(transition.lfoIndex, updatedLFO)
+          }
+        }
+
+        if (progress < 1) {
+          allComplete = false
+        }
+      })
+
+      if (!allComplete) {
+        interpolationRef.current = requestAnimationFrame(animate)
+      } else {
+        interpolationRef.current = null
+      }
+    }
+
+    interpolationRef.current = requestAnimationFrame(animate)
+  }, [handleEngineChange, handleEffectChange, playbackManager])
+
   return {
     saveCurrentParams,
     loadParams,
     handleEngineChange,
     handleEffectChange,
     randomizeParams,
-    randomizeAllParams
+    randomizeAllParams,
+    interpolateParams
   }
 }
diff --git a/src/hooks/useTileGrid.ts b/src/hooks/useTileGrid.ts
index 3ec50a1f..9f200044 100644
--- a/src/hooks/useTileGrid.ts
+++ b/src/hooks/useTileGrid.ts
@@ -26,7 +26,7 @@ export function useTileGrid() {
     }
   }, [mode, engineValues.complexity])
 
-  const regenerateTile = useCallback((row: number, col: number) => {
+  const regenerateTile = useCallback((row: number, col: number): TileState => {
     let newTile: TileState
 
     if (mode === 'fm') {
@@ -43,6 +43,8 @@ export function useTileGrid() {
       newTiles[row][col] = newTile
       return newTiles
     })
+
+    return newTile
   }, [mode, engineValues.complexity])
 
   const switchMode = useCallback((newMode: SynthesisMode) => {