fix: câm toàn cục + BiquadFilterNode state is bad - gỡ mastering khỏi getAudioContext (chỉ áp dụng ở initMasterBus/effect), time constant chậm hơn + cancelScheduledValues, toggleMasteringOnMaster luôn reconnect dù lỗi

app/static/js/app.precompiled.js

@@ -19,7 +19,10 @@ const sig=[s.eqActive,s.eqLowGain,s.eqMid1Gain,s.eqMid2Gain,s.eqHighGain,s.image
 // chain into a bad state and silences ALL audio (the "mất soundfont" symptom).
 const clamp=(v,lo,hi)=>{const n=Number(v);if(!isFinite(n))return 0;// missing/NaN → neutral, never a filter-breaking value
 return Math.min(hi,Math.max(lo,n));};// 1. EQ Settings
-masterBus.eqLowFilter.gain.setTargetAtTime(s.eqActive?clamp(s.eqLowGain,-24,24):0,now,0.01);masterBus.eqMid1Filter.gain.setTargetAtTime(s.eqActive?clamp(s.eqMid1Gain,-24,24):0,now,0.01);masterBus.eqMid2Filter.gain.setTargetAtTime(s.eqActive?clamp(s.eqMid2Gain,-24,24):0,now,0.01);masterBus.eqHighFilter.gain.setTargetAtTime(s.eqActive?clamp(s.eqHighGain,-24,24):0,now,0.01);// 2. Imager Settings (Mid/Side matrix width control for each band)
+// cancelScheduledValues + a slower time constant keeps rapid slider drags
+// from piling up automation events on the biquad filters (the trigger for
+// Chromium's "BiquadFilterNode: state is bad").
+masterBus.eqLowFilter.gain.cancelScheduledValues(now);masterBus.eqLowFilter.gain.setTargetAtTime(s.eqActive?clamp(s.eqLowGain,-24,24):0,now,0.05);masterBus.eqMid1Filter.gain.cancelScheduledValues(now);masterBus.eqMid1Filter.gain.setTargetAtTime(s.eqActive?clamp(s.eqMid1Gain,-24,24):0,now,0.05);masterBus.eqMid2Filter.gain.cancelScheduledValues(now);masterBus.eqMid2Filter.gain.setTargetAtTime(s.eqActive?clamp(s.eqMid2Gain,-24,24):0,now,0.05);masterBus.eqHighFilter.gain.cancelScheduledValues(now);masterBus.eqHighFilter.gain.setTargetAtTime(s.eqActive?clamp(s.eqHighGain,-24,24):0,now,0.05);// 2. Imager Settings (Mid/Side matrix width control for each band)
 const updateImagerBand=(w,active,gainLL,gainRL,gainLR,gainRR)=>{const widthVal=s.imagerActive&&active?clamp(w,-100,100):0;const g1=1+widthVal/200;const g2=-widthVal/200;gainLL.gain.setTargetAtTime(g1,now,0.01);gainRR.gain.setTargetAtTime(g1,now,0.01);gainRL.gain.setTargetAtTime(g2,now,0.01);gainLR.gain.setTargetAtTime(g2,now,0.01);};updateImagerBand(s.w1,true,masterBus.gainLL1,masterBus.gainRL1,masterBus.gainLR1,masterBus.gainRR1);updateImagerBand(s.w2,true,masterBus.gainLL2,masterBus.gainRL2,masterBus.gainLR2,masterBus.gainRR2);updateImagerBand(s.w3,true,masterBus.gainLL3,masterBus.gainRL3,masterBus.gainLR3,masterBus.gainRR3);updateImagerBand(s.w4,true,masterBus.gainLL4,masterBus.gainRL4,masterBus.gainLR4,masterBus.gainRR4);// 3. Maximizer Settings
 const boostLinear=s.maximizerActive?Math.pow(10,clamp(s.maxGain,-60,30)/20):1.0;masterBus.maximizerBoostGain.gain.setTargetAtTime(boostLinear,now,0.01);// Soft Clipper
 if(s.maximizerActive&&s.maxSoftClip>0){const k=1+clamp(s.maxSoftClip,0,100)/100*10;masterBus.maximizerSoftClipper.curve=makeDistortionCurve(k);}else{masterBus.maximizerSoftClipper.curve=null;}// Upward Compressor
@@ -42,13 +45,20 @@ eqLowFilter.connect(eqMid1Filter);eqMid1Filter.connect(eqMid2Filter);eqMid2Filte
 eqHighFilter.connect(imagerInput);// Connect Imager to Maximizer
 imagerOutput.connect(maximizerBoostGain);// Setup default non-mastered routing:
 // input -> compressor -> inputAnalyser -> outputAnalyser -> output -> analyser -> destination
-masterBus.input.connect(masterBus.compressor);masterBus.compressor.connect(masterBus.inputAnalyser);masterBus.inputAnalyser.connect(masterBus.outputAnalyser);masterBus.outputAnalyser.connect(masterBus.output);masterBus.output.connect(masterBus.analyser);masterBus.analyser.connect(ctx.destination);window.masterBus=masterBus;return masterBus;}function setMasterVolume(linear){if(masterBus)masterBus.output.gain.setValueAtTime(linear,audioCtx.currentTime);}let _lastMasteringActive=null;let _lastMasteringSig=null;function toggleMasteringOnMaster(activate,isBypassed){if(!masterBus)return;const active=!!(activate&&!isBypassed);// Idempotent: don't disconnect/reconnect the mastering chain on every call
-// (getAudioContext invokes this constantly). Rapid re-connection while audio
-// flows destabilizes the biquad filters → "BiquadFilterNode: state is bad".
-if(_lastMasteringActive===active&&masterBus.masteringActive===active)return;_lastMasteringActive=active;// Disconnect the dynamic junction
-masterBus.inputAnalyser.disconnect();masterBus.maximizerCompressor.disconnect();if(active){// Active routing: inputAnalyser -> EQ -> Imager -> Maximizer -> outputAnalyser
-masterBus.inputAnalyser.connect(masterBus.eqLowFilter);masterBus.maximizerCompressor.connect(masterBus.outputAnalyser);masterBus.masteringActive=true;}else{// Bypassed routing: inputAnalyser -> outputAnalyser
-masterBus.inputAnalyser.connect(masterBus.outputAnalyser);masterBus.masteringActive=false;}}function getAudioContext(){if(!audioCtx){audioCtx=new(window.AudioContext||window.webkitAudioContext)();if(window.SonicAudio&&window.SonicAudio.initAudioWorklet){window.SonicAudio.initAudioWorklet();}}if(audioCtx.state==='suspended'){audioCtx.resume();}if(!masterBus){initMasterBus(audioCtx);}if(window.currentMasteringSettings){toggleMasteringOnMaster(window.currentMasteringSettings.masterConnected,window.currentMasteringSettings.isBypassed);applyMasteringSettings(window.currentMasteringSettings);}if(window.SonicSF&&window.SonicSF.init){window.SonicSF.init(audioCtx);}return audioCtx;}const formatTime=secs=>{if(isNaN(secs)||secs<0)return"0:00.000";const m=Math.floor(secs/60);const s=Math.floor(secs%60);const ms=Math.floor(secs%1*1000).toString().padStart(3,'0');return`${m}:${s.toString().padStart(2,'0')}.${ms}`;};const formatTimeSimple=secs=>{if(isNaN(secs)||secs<0)return"0.00s";return`${secs.toFixed(2)}s`;};const formatBeat=(secs,bpmVal)=>{if(isNaN(secs)||secs<0)return"0.1.1";const beatDuration=60/bpmVal;const barDuration=beatDuration*4;const bar=Math.floor(secs/barDuration);const beat=Math.floor(secs%barDuration/beatDuration)+1;const sub=Math.floor(secs%beatDuration/(beatDuration/4))+1;return`${bar}.${beat}.${sub}`;};const midiPitchToName=pitch=>{const names=['C','C#','D','D#','E','F','F#','G','G#','A','A#','B'];const octave=Math.floor(pitch/12)-1;return names[pitch%12]+octave;};const getBeatMarkers=(maxDur,bpmVal)=>{const beatDuration=60/bpmVal;const barDuration=beatDuration*4;const markers=[];for(let t=0;t<=maxDur;t+=beatDuration){const isBar=Math.abs(t%barDuration)<0.001||Math.abs(t%barDuration-barDuration)<0.001;markers.push({time:t,isBar,beatNum:Math.floor(t/beatDuration)+1});}return markers;};const findZeroCrossing=(buffer,targetTime)=>{if(!buffer)return targetTime;const sampleRate=buffer.sampleRate;const data=buffer.getChannelData(0);const targetSample=Math.floor(targetTime*sampleRate);const windowSize=Math.floor(0.04*sampleRate);const start=Math.max(0,targetSample-windowSize);const end=Math.min(data.length-2,targetSample+windowSize);let bestSample=targetSample;let minDistance=Infinity;for(let i=start;i<=end;i++){if(data[i]>=0&&data[i+1]<=0||data[i]<=0&&data[i+1]>=0){const dist=Math.abs(i-targetSample);if(dist<minDistance){minDistance=dist;bestSample=i;}}}return bestSample/sampleRate;};class ClientMIDIRecorder{constructor(audioContext,bpm=120,timeSigNumerator=4){this.audioCtx=audioContext;this.bpm=bpm;this.timeSigNum=timeSigNumerator;this.isRecording=false;this.tempMidiItemId=null;this.activeNotes=new Map();// Store pitch -> { noteId, startBeat, velocity }
+masterBus.input.connect(masterBus.compressor);masterBus.compressor.connect(masterBus.inputAnalyser);masterBus.inputAnalyser.connect(masterBus.outputAnalyser);masterBus.outputAnalyser.connect(masterBus.output);masterBus.output.connect(masterBus.analyser);masterBus.analyser.connect(ctx.destination);window.masterBus=masterBus;// Apply mastering once when the chain is first created (and on the
+// masteringSettings effect for subsequent changes — see useEffect).
+if(window.currentMasteringSettings){try{toggleMasteringOnMaster(window.currentMasteringSettings.masterConnected,window.currentMasteringSettings.isBypassed);applyMasteringSettings(window.currentMasteringSettings);}catch(e){console.warn('initMasterBus apply mastering error:',e);}}return masterBus;}function setMasterVolume(linear){if(masterBus)masterBus.output.gain.setValueAtTime(linear,audioCtx.currentTime);}let _lastMasteringActive=null;let _lastMasteringSig=null;function toggleMasteringOnMaster(activate,isBypassed){if(!masterBus)return;const active=!!(activate&&!isBypassed);// Idempotent: don't disconnect/reconnect the mastering chain on every call.
+if(_lastMasteringActive===active&&masterBus.masteringActive===active)return;_lastMasteringActive=active;// Disconnect + immediately reconnect in one synchronous block so the master
+// routing can NEVER be left broken (a mid-swap exception would otherwise
+// disconnect inputAnalyser and silence ALL audio globally).
+try{masterBus.inputAnalyser.disconnect();masterBus.maximizerCompressor.disconnect();if(active){masterBus.inputAnalyser.connect(masterBus.eqLowFilter);masterBus.maximizerCompressor.connect(masterBus.outputAnalyser);masterBus.masteringActive=true;}else{masterBus.inputAnalyser.connect(masterBus.outputAnalyser);masterBus.masteringActive=false;}}catch(e){console.warn('toggleMasteringOnMaster error:',e);// Restore a guaranteed-valid default routing regardless of the failure.
+try{masterBus.inputAnalyser.disconnect();masterBus.maximizerCompressor.disconnect();masterBus.inputAnalyser.connect(masterBus.outputAnalyser);masterBus.masteringActive=false;}catch(e2){}}}function getAudioContext(){if(!audioCtx){audioCtx=new(window.AudioContext||window.webkitAudioContext)();if(window.SonicAudio&&window.SonicAudio.initAudioWorklet){window.SonicAudio.initAudioWorklet();}}if(audioCtx.state==='suspended'){audioCtx.resume();}if(!masterBus){initMasterBus(audioCtx);}// The mastering chain is ONLY managed by the masteringSettings effect — NOT
+// here. getAudioContext runs constantly (play, stopAll, VU, double-click…);
+// re-toggling/re-automating the biquad EQ here in bursts is "fast parameter
+// automation" that makes Chromium flag the filters as unstable
+// ("BiquadFilterNode: state is bad") and can leave the master routing broken
+// → global silence. The React effect applies it once per settings change.
+if(window.SonicSF&&window.SonicSF.init){window.SonicSF.init(audioCtx);}return audioCtx;}const formatTime=secs=>{if(isNaN(secs)||secs<0)return"0:00.000";const m=Math.floor(secs/60);const s=Math.floor(secs%60);const ms=Math.floor(secs%1*1000).toString().padStart(3,'0');return`${m}:${s.toString().padStart(2,'0')}.${ms}`;};const formatTimeSimple=secs=>{if(isNaN(secs)||secs<0)return"0.00s";return`${secs.toFixed(2)}s`;};const formatBeat=(secs,bpmVal)=>{if(isNaN(secs)||secs<0)return"0.1.1";const beatDuration=60/bpmVal;const barDuration=beatDuration*4;const bar=Math.floor(secs/barDuration);const beat=Math.floor(secs%barDuration/beatDuration)+1;const sub=Math.floor(secs%beatDuration/(beatDuration/4))+1;return`${bar}.${beat}.${sub}`;};const midiPitchToName=pitch=>{const names=['C','C#','D','D#','E','F','F#','G','G#','A','A#','B'];const octave=Math.floor(pitch/12)-1;return names[pitch%12]+octave;};const getBeatMarkers=(maxDur,bpmVal)=>{const beatDuration=60/bpmVal;const barDuration=beatDuration*4;const markers=[];for(let t=0;t<=maxDur;t+=beatDuration){const isBar=Math.abs(t%barDuration)<0.001||Math.abs(t%barDuration-barDuration)<0.001;markers.push({time:t,isBar,beatNum:Math.floor(t/beatDuration)+1});}return markers;};const findZeroCrossing=(buffer,targetTime)=>{if(!buffer)return targetTime;const sampleRate=buffer.sampleRate;const data=buffer.getChannelData(0);const targetSample=Math.floor(targetTime*sampleRate);const windowSize=Math.floor(0.04*sampleRate);const start=Math.max(0,targetSample-windowSize);const end=Math.min(data.length-2,targetSample+windowSize);let bestSample=targetSample;let minDistance=Infinity;for(let i=start;i<=end;i++){if(data[i]>=0&&data[i+1]<=0||data[i]<=0&&data[i+1]>=0){const dist=Math.abs(i-targetSample);if(dist<minDistance){minDistance=dist;bestSample=i;}}}return bestSample/sampleRate;};class ClientMIDIRecorder{constructor(audioContext,bpm=120,timeSigNumerator=4){this.audioCtx=audioContext;this.bpm=bpm;this.timeSigNum=timeSigNumerator;this.isRecording=false;this.tempMidiItemId=null;this.activeNotes=new Map();// Store pitch -> { noteId, startBeat, velocity }
 this.recordedNotes=[];this.recStartAudioTime=0.0;this.recStartBar=0.0;this.selectedMidiInputId=null;// Compute round-trip browser latency
 this.latencyCompSec=(this.audioCtx.baseLatency||0)+(this.audioCtx.outputLatency||0);}start(startBar=0.0,selectedMidiInputId=null){this.isRecording=true;this.recordedNotes=[];this.activeNotes.clear();this.recStartBar=startBar;this.recStartAudioTime=this.audioCtx.currentTime;this.selectedMidiInputId=selectedMidiInputId;}handleMIDIMessage(event,sourceInputId=null){if(!this.isRecording)return;if(this.selectedMidiInputId&&this.selectedMidiInputId!=='ALL'&&sourceInputId&&sourceInputId!==this.selectedMidiInputId){console.log(`[DevLog] [MIDI Rec] Ignoring input message from "${sourceInputId}" (Selected: "${this.selectedMidiInputId}")`);return;}const[status,pitch,velocity]=event.data;const command=status>>4;// Apply latency compensation formula
 const currentTimeSec=Math.max(0,this.audioCtx.currentTime-this.recStartAudioTime-this.latencyCompSec);const secondsPerBeat=60.0/this.bpm;const currentBeat=currentTimeSec/secondsPerBeat;// Command 0x9: Note On