V45.27: fix (1) PR tab preview cam khi sub-tab PR khong ARM - ARM MAIN/SECTION cuc bo, khong leak sang PR (3 nhanh: vkbNoteOn prArmedIds + attachMidiHandler bridge bPrArmed + SonicSF arSubs them && isArmed); (2) crackle preview VST2 instrument loop/tremolo - ring worklet bridgeAudioWorklet 16->32 block (~170ms) hap thu stall render loop C++ khi instrument xu li loop/tremolo nang CPU (8->16 truoc da dung tremolo, 16 chua du); them stats overrun/underrun tu worklet -> getDiag/preview_diag (ws=ov/un) de xac minh con crackle khong. v=202608311809

app/static/js/app.jsx

@@ -280,7 +280,8 @@ const _dbgWorkletState = () => {
   try {
     if (window.BridgeAudioNode && window.BridgeAudioNode.getDiag) {
       const _d = window.BridgeAudioNode.getDiag();
-      return 'wl=' + (_d.useWorklet ? 'y' : 'n') + ' pre=' + _d.preBufferLen + ' ch=' + _d.chunksLen;
+      const _ws = _d.ws ? (' ov=' + _d.ws.overruns + ' un=' + _d.ws.underruns + ' ring=' + _d.ws.ring) : '';
+      return 'wl=' + (_d.useWorklet ? 'y' : 'n') + ' pre=' + _d.preBufferLen + ' ch=' + _d.chunksLen + _ws;
     }
   } catch (e) {}
   return 'wl=n/a';
@@ -11118,7 +11119,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
                 const _pdTab = activeTabRef.current;
                 const _pdSub = subTabsRef.current ? (subTabsRef.current.find(s => s.id === _pdTab) || {}).type : null;
                 const _kbArmedTab = !!(subTabsRef.current || []).some(function (s) { return s.type === 'PIANO_ROLL' && s.isArmed && s.trackId === st.trackId; });
-                _dbgLog('preview_diag', 'src=keybed trk=' + st.trackId + ' kbTrk=' + (kbTrk ? kbTrk.id : 'UNDEF') + ' kbArmedTab=' + (_kbArmedTab ? 1 : 0) + ' armedTrk=' + (kbTrk && kbTrk.isArmed ? 1 : 0) + ' sl=' + (_kbSilent ? 1 : 0) + ' tab=' + _pdTab + ' sub=' + (_pdSub || 'none') + ' play=' + (isPlayingRef.current ? 1 : 0) + ' br=' + (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive() ? 1 : 0) + ' fxRt=' + (fxRt.active ? 1 : 0) + ' dest=' + _pdDest + ' bd=' + (_pdD ? ('i=' + _pdD.initialized + ' wl=' + _pdD.useWorklet + ' nd=' + _pdD.hasWorkletNode + ' pre=' + _pdD.preBufferLen + ' ch=' + _pdD.chunksLen + ' g=' + _pdD.gain) : 'MISSING') + ' mb=' + (!!masterBus));
+                _dbgLog('preview_diag', 'src=keybed trk=' + st.trackId + ' kbTrk=' + (kbTrk ? kbTrk.id : 'UNDEF') + ' kbArmedTab=' + (_kbArmedTab ? 1 : 0) + ' armedTrk=' + (kbTrk && kbTrk.isArmed ? 1 : 0) + ' sl=' + (_kbSilent ? 1 : 0) + ' tab=' + _pdTab + ' sub=' + (_pdSub || 'none') + ' play=' + (isPlayingRef.current ? 1 : 0) + ' br=' + (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive() ? 1 : 0) + ' fxRt=' + (fxRt.active ? 1 : 0) + ' dest=' + _pdDest + ' bd=' + (_pdD ? ('i=' + _pdD.initialized + ' wl=' + _pdD.useWorklet + ' nd=' + _pdD.hasWorkletNode + ' pre=' + _pdD.preBufferLen + ' ch=' + _pdD.chunksLen + ' g=' + _pdD.gain + ' ws=' + (_pdD.ws ? (_pdD.ws.overruns + '/' + _pdD.ws.underruns) : '-')) : 'MISSING') + ' mb=' + (!!masterBus));
               } catch (e) {}
               // V45.19 Bug 2: _kbSilent -> bo qua phat (MAIN/SECTION + ARM off = cam).
               if (!_kbSilent) {
@@ -18666,9 +18667,9 @@ const App = () => {
                     var bPrArmed = {};
                     if (_isPrTabNow) {
                       try {
-                        // V45.25: chi sub-tab PR dang active; khong gom ARM sub-tab khac.
+                        // V45.27: chi sub-tab PR dang active VA co ARM (isArmed); khong gom ARM sub-tab khac / MAIN.
                         var _actPrSub = (subTabsRef.current || []).find(function (s) { return s.id === activeTabRef.current; });
-                        if (_actPrSub && _actPrSub.type === 'PIANO_ROLL' && _actPrSub.trackId) bPrArmed[_actPrSub.trackId] = true;
+                        if (_actPrSub && _actPrSub.type === 'PIANO_ROLL' && _actPrSub.isArmed && _actPrSub.trackId) bPrArmed[_actPrSub.trackId] = true;
                       } catch (e) {}
                     }
                     bTracks.forEach(function (bt) {
@@ -18687,10 +18688,10 @@ const App = () => {
                   } else if (window.SonicSF) {
                      var allTracks = activeTracksRef.current || [];
                      var arSubs = [];
-                     // V45.25: chi sub-tab PR dang active; khong gom ARM sub-tab khac.
+                     // V45.27: chi sub-tab PR dang active VA co ARM (isArmed); khong gom ARM sub-tab khac / MAIN.
                      if (_isPrTabNow && subTabsRef && subTabsRef.current) {
                        var _actPrSub = subTabsRef.current.find(function(s) { return s.id === activeTabRef.current; });
-                       if (_actPrSub && _actPrSub.type === 'PIANO_ROLL' && _actPrSub.trackId) arSubs.push(_actPrSub);
+                       if (_actPrSub && _actPrSub.type === 'PIANO_ROLL' && _actPrSub.isArmed && _actPrSub.trackId) arSubs.push(_actPrSub);
                      }
                      var armedTracks = _isPrTabNow ? [] : allTracks.filter(function(t) { return t.isArmed; });
                      // Piano Roll arming has priority: route to each armed sub-tab's parent track
@@ -23925,11 +23926,11 @@ const App = () => {
     const _prTabNow = (subTabsRef.current || []).find(function (s) { return s.id === activeTabRef.current; });
     const _isPrTabNow = !!(_prTabNow && _prTabNow.type === 'PIANO_ROLL');
     const prArmedIds = {};
-    // V45.25: PR tab preview chi track dang edit (sub-tab active) - bat ke ARM.
+    // V45.27: PR tab preview chi track dang edit (sub-tab active) VA chi khi sub-tab do ARM (isArmed).
     // ARM tu sub-tab PR khac / track MAIN KHONG leak sang PR tab nay.
     try {
       if (_isPrTabNow) {
-        if (_prTabNow.trackId) prArmedIds[_prTabNow.trackId] = true;
+        if (_prTabNow.isArmed && _prTabNow.trackId) prArmedIds[_prTabNow.trackId] = true;
       }
     } catch (e) {}
     const armed = allTracks.filter(function (t) { return t.isArmed; });
@@ -23948,7 +23949,7 @@ const App = () => {
       const _pdD = window.BridgeAudioNode ? window.BridgeAudioNode.getDiag() : null;
       const _pdTab = activeTabRef.current;
       const _pdSub = subTabsRef.current ? (subTabsRef.current.find(s => s.id === _pdTab) || {}).type : null;
-      _dbgLog('preview_diag', 'armed=' + armed.length + ' trg=' + targets.length + ' prTab=' + (_isPrTabNow ? 1 : 0) + ' tab=' + _pdTab + ' sub=' + (_pdSub || 'none') + ' play=' + (isPlayingRef.current ? 1 : 0) + ' br=' + (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive() ? 1 : 0) + ' fxRt=' + (fxRt.active ? 1 : 0) + ' dest=' + _pdDest + ' bd=' + (_pdD ? ('i=' + _pdD.initialized + ' wl=' + _pdD.useWorklet + ' nd=' + _pdD.hasWorkletNode + ' pre=' + _pdD.preBufferLen + ' ch=' + _pdD.chunksLen + ' g=' + _pdD.gain) : 'MISSING') + ' mb=' + (!!masterBus));
+      _dbgLog('preview_diag', 'armed=' + armed.length + ' trg=' + targets.length + ' prTab=' + (_isPrTabNow ? 1 : 0) + ' tab=' + _pdTab + ' sub=' + (_pdSub || 'none') + ' play=' + (isPlayingRef.current ? 1 : 0) + ' br=' + (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive() ? 1 : 0) + ' fxRt=' + (fxRt.active ? 1 : 0) + ' dest=' + _pdDest + ' bd=' + (_pdD ? ('i=' + _pdD.initialized + ' wl=' + _pdD.useWorklet + ' nd=' + _pdD.hasWorkletNode + ' pre=' + _pdD.preBufferLen + ' ch=' + _pdD.chunksLen + ' g=' + _pdD.gain + ' ws=' + (_pdD.ws ? (_pdD.ws.overruns + '/' + _pdD.ws.underruns) : '-')) : 'MISSING') + ' mb=' + (!!masterBus));
     } catch (e) {}
     // DIAG Bug 3/4: arm bo dem audio frames (500ms sau note-on) de biet
     // engine co gui audio ve JS khong (tach engine vs JS routing).

app/static/js/app.precompiled.js

@@ -63,7 +63,7 @@ let _cc11Epoch=0;// V17: fade session dang treo (gain ramp FADE_MS) — restore
 let _pendingFadeSession=null;const restorePendingFadeSession=()=>{if(!_pendingFadeSession)return;let _bgBefore=-1;try{if(_pendingFadeSession.bridgeGainNode)_bgBefore=_pendingFadeSession.bridgeGainNode.gain.value;}catch(e){}try{const t=getAudioContext().currentTime;_pendingFadeSession.fadedGains.forEach(g=>{try{g.node.gain.cancelScheduledValues(t);g.node.gain.setValueAtTime(g.prev,t);}catch(e){}});if(_pendingFadeSession.bridgeGainNode){try{_pendingFadeSession.bridgeGainNode.gain.cancelScheduledValues(t);_pendingFadeSession.bridgeGainNode.gain.setValueAtTime(1.0,t);}catch(e){}}}catch(e){}_dbgLog('restore','gains='+_pendingFadeSession.fadedGains.length+' bg='+_bgBefore.toFixed(4)+'->1.0');_pendingFadeSession=null;};// V28: timing diagnostics -> %APPDATA%/SonicForgeDAW/logs/dbg.log (Rust dbg_log).
 // Fire-and-forget invoke — khong chan main thread; tag+extra ghi kem unix_ms.
 const _dbgLog=(tag,extra)=>{try{if(window.__TAURI__&&window.__TAURI__.core&&window.__TAURI__.core.invoke){window.__TAURI__.core.invoke('dbg_log',{tag:tag,extra:extra===undefined?'':String(extra)}).catch(function(){});}}catch(e){}};// V29: expose dbg hook cho BridgeAudioNode (worklet state) + helpers.
-window.__dbgLog=_dbgLog;if(window.PerformanceObserver){try{new PerformanceObserver(list=>{for(const e of list.getEntries())_dbgLog('longtask','d='+Math.round(e.duration)+' s='+Math.round(e.startTime));}).observe({entryTypes:['longtask']});}catch(e){}}const _dbgBridgeGain=()=>{try{if(window.BridgeAudioNode&&window.BridgeAudioNode.getOutputNode){const _g=window.BridgeAudioNode.getOutputNode();if(_g&&_g.gain)return'bg='+_g.gain.value.toFixed(4);return'bg=none';}}catch(e){}return'bg=n/a';};const _dbgWorkletState=()=>{try{if(window.BridgeAudioNode&&window.BridgeAudioNode.getDiag){const _d=window.BridgeAudioNode.getDiag();return'wl='+(_d.useWorklet?'y':'n')+' pre='+_d.preBufferLen+' ch='+_d.chunksLen;}}catch(e){}return'wl=n/a';};window.__dbgBridgeGain=_dbgBridgeGain;window.__dbgWorkletState=_dbgWorkletState;// V28: ding fix — midi bat ky (keyboard/pad/timeline) restore bridge gain sau
+window.__dbgLog=_dbgLog;if(window.PerformanceObserver){try{new PerformanceObserver(list=>{for(const e of list.getEntries())_dbgLog('longtask','d='+Math.round(e.duration)+' s='+Math.round(e.startTime));}).observe({entryTypes:['longtask']});}catch(e){}}const _dbgBridgeGain=()=>{try{if(window.BridgeAudioNode&&window.BridgeAudioNode.getOutputNode){const _g=window.BridgeAudioNode.getOutputNode();if(_g&&_g.gain)return'bg='+_g.gain.value.toFixed(4);return'bg=none';}}catch(e){}return'bg=n/a';};const _dbgWorkletState=()=>{try{if(window.BridgeAudioNode&&window.BridgeAudioNode.getDiag){const _d=window.BridgeAudioNode.getDiag();const _ws=_d.ws?' ov='+_d.ws.overruns+' un='+_d.ws.underruns+' ring='+_d.ws.ring:'';return'wl='+(_d.useWorklet?'y':'n')+' pre='+_d.preBufferLen+' ch='+_d.chunksLen+_ws;}}catch(e){}return'wl=n/a';};window.__dbgBridgeGain=_dbgBridgeGain;window.__dbgWorkletState=_dbgWorkletState;// V28: ding fix — midi bat ky (keyboard/pad/timeline) restore bridge gain sau
 // stop (gain giu ~0.0001 — V27 restore 800ms khong du cho VSTi release tail dai).
 window.__restorePendingFadeSession=restorePendingFadeSession;// V31: live note (ARM keyboard) — xoa backlog outQueue master FX truoc khi
 // note preview render (idle block ~341ms lam ARM lag ~0.3s).
@@ -344,7 +344,7 @@ else if(fxRt.chainKey!==ck){fxRtSetChain(chain);fxRt.chainKey=ck;return;}else re
 // node → bypass vô hiệu. Mỗi fxRtStop() bump startToken → mọi checkpoint
 // dưới đây thấy mismatch → hủy session vừa tạo, không nối node.
 const token=++fxRt.startToken;fxRt.starting=true;const ctx=getAudioContext();if(!ctx||!ctx.audioWorklet||!masterBus||!masterBus.output||!masterBus.analyser||!masterBus.masterFxGain||!masterBus.masterFxDryGain)return;const chainPayload=chain.map(s=>s.type==='vst3'?{type:'vst3',path:s.path,name:s.name||s.path,preset_b64:s.preset_b64||'',bypass:!!s.bypass||!!(window.currentMasteringSettings||{}).vstBypass}:{type:'builtin',id:s.type,params:s.params&&Object.keys(s.params).length?s.params:{},bypass:!!s.bypass});let st;try{st=await window.SonicAPI.fxRealtimeStart({fx_chain:chainPayload,sample_rate:ctx.sampleRate||44100});}catch(e){console.warn('[FX RT] start fail:',e);showToast('Không khởi động VST FX realtime: '+(e.message||e),'warning');fxRt.starting=false;return;}if(token!==fxRt.startToken){// Bypass/stop giữa lúc engine đang load chain — hủy session vừa tạo.
-console.warn('[FX RT] start cancelled mid-flight — session stopped');try{window.SonicAPI.fxRealtimeStop({session_id:st.session_id}).catch(()=>{});}catch(e2){}fxRt.starting=false;return;}fxRt.sessionId=st.session_id;fxRtGuiPushShm();try{await ctx.audioWorklet.addModule(`${API_BASE_URL}/static/js/sf-fx-realtime.js?v=202608311756`);if(token!==fxRt.startToken){fxRt.starting=false;return;}fxRt.node=new AudioWorkletNode(ctx,'sf-fx-realtime',{numberOfInputs:1,numberOfOutputs:1,outputChannelCount:[2]});const u=new URL(API_BASE_URL);const wsProto=u.protocol==='https:'?'wss://':'ws://';// WS to 'localhost' bi tre ~300ms: Chromium thu ::1 truoc (Windows khong
+console.warn('[FX RT] start cancelled mid-flight — session stopped');try{window.SonicAPI.fxRealtimeStop({session_id:st.session_id}).catch(()=>{});}catch(e2){}fxRt.starting=false;return;}fxRt.sessionId=st.session_id;fxRtGuiPushShm();try{await ctx.audioWorklet.addModule(`${API_BASE_URL}/static/js/sf-fx-realtime.js?v=202608311809`);if(token!==fxRt.startToken){fxRt.starting=false;return;}fxRt.node=new AudioWorkletNode(ctx,'sf-fx-realtime',{numberOfInputs:1,numberOfOutputs:1,outputChannelCount:[2]});const u=new URL(API_BASE_URL);const wsProto=u.protocol==='https:'?'wss://':'ws://';// WS to 'localhost' bi tre ~300ms: Chromium thu ::1 truoc (Windows khong
 // co listener IPv6 -> SYN hang ~2s) roi moi fallback 127.0.0.1. Dung
 // thang 127.0.0.1 (loopback) -> WS open ~5ms. Server chap nhan loopback.
 const wsHost=u.hostname==='localhost'||u.hostname==='::1'?'127.0.0.1'+(u.port?':'+u.port:''):u.host;const tok=localStorage.getItem('sonic_token')||'';const wsUrl=`${wsProto}${wsHost}${st.ws_url}${tok?'?token='+encodeURIComponent(tok):''}`;const ws=new WebSocket(wsUrl);fxRt.ws=ws;ws.binaryType='arraybuffer';ws.onopen=()=>{if(token!==fxRt.startToken){try{ws.close();}catch(e){}fxRt.starting=false;return;}fxRt.active=true;fxRt.flushing=false;fxRt.starting=false;fxRt.inQueue=[];// bỏ audio stale sản xuất trước khi WS open (~4s load VST) — hết lag khởi đầu
@@ -904,7 +904,7 @@ const _kbSilent=false;const keys=[];for(let pitch=127;pitch>=PITCH_START;pitch--
 // keybed PHẢI qua mastering FX của main out khi chain đang bật
 // (trước đây phải bật/tắt power mới có tác dụng).
 try{if(window.__ensureMasteringRouting)window.__ensureMasteringRouting();}catch(er){}// DIAG Bug 2 (keybed ARM khong am): routing + ARM state tai note-on.
-try{let _pdDest='none';if(window.AudioRoutingEngine&&window.AudioRoutingEngine._connected){_pdDest=window.AudioRoutingEngine._dest&&window.AudioRoutingEngine._dest.constructor?window.AudioRoutingEngine._dest.constructor.name:'null';_pdDest+='/'+window.AudioRoutingEngine._trackId;}else{_pdDest='NOT_CONNECTED';}const _pdD=window.BridgeAudioNode?window.BridgeAudioNode.getDiag():null;const _pdTab=activeTabRef.current;const _pdSub=subTabsRef.current?(subTabsRef.current.find(s=>s.id===_pdTab)||{}).type:null;const _kbArmedTab=!!(subTabsRef.current||[]).some(function(s){return s.type==='PIANO_ROLL'&&s.isArmed&&s.trackId===st.trackId;});_dbgLog('preview_diag','src=keybed trk='+st.trackId+' kbTrk='+(kbTrk?kbTrk.id:'UNDEF')+' kbArmedTab='+(_kbArmedTab?1:0)+' armedTrk='+(kbTrk&&kbTrk.isArmed?1:0)+' sl='+(_kbSilent?1:0)+' tab='+_pdTab+' sub='+(_pdSub||'none')+' play='+(isPlayingRef.current?1:0)+' br='+(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive()?1:0)+' fxRt='+(fxRt.active?1:0)+' dest='+_pdDest+' bd='+(_pdD?'i='+_pdD.initialized+' wl='+_pdD.useWorklet+' nd='+_pdD.hasWorkletNode+' pre='+_pdD.preBufferLen+' ch='+_pdD.chunksLen+' g='+_pdD.gain:'MISSING')+' mb='+!!masterBus);}catch(e){}// V45.19 Bug 2: _kbSilent -> bo qua phat (MAIN/SECTION + ARM off = cam).
+try{let _pdDest='none';if(window.AudioRoutingEngine&&window.AudioRoutingEngine._connected){_pdDest=window.AudioRoutingEngine._dest&&window.AudioRoutingEngine._dest.constructor?window.AudioRoutingEngine._dest.constructor.name:'null';_pdDest+='/'+window.AudioRoutingEngine._trackId;}else{_pdDest='NOT_CONNECTED';}const _pdD=window.BridgeAudioNode?window.BridgeAudioNode.getDiag():null;const _pdTab=activeTabRef.current;const _pdSub=subTabsRef.current?(subTabsRef.current.find(s=>s.id===_pdTab)||{}).type:null;const _kbArmedTab=!!(subTabsRef.current||[]).some(function(s){return s.type==='PIANO_ROLL'&&s.isArmed&&s.trackId===st.trackId;});_dbgLog('preview_diag','src=keybed trk='+st.trackId+' kbTrk='+(kbTrk?kbTrk.id:'UNDEF')+' kbArmedTab='+(_kbArmedTab?1:0)+' armedTrk='+(kbTrk&&kbTrk.isArmed?1:0)+' sl='+(_kbSilent?1:0)+' tab='+_pdTab+' sub='+(_pdSub||'none')+' play='+(isPlayingRef.current?1:0)+' br='+(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive()?1:0)+' fxRt='+(fxRt.active?1:0)+' dest='+_pdDest+' bd='+(_pdD?'i='+_pdD.initialized+' wl='+_pdD.useWorklet+' nd='+_pdD.hasWorkletNode+' pre='+_pdD.preBufferLen+' ch='+_pdD.chunksLen+' g='+_pdD.gain+' ws='+(_pdD.ws?_pdD.ws.overruns+'/'+_pdD.ws.underruns:'-'):'MISSING')+' mb='+!!masterBus);}catch(e){}// V45.19 Bug 2: _kbSilent -> bo qua phat (MAIN/SECTION + ARM off = cam).
 if(!_kbSilent){try{window.__dbgPreviewAudioArmed={count:0,nz:0,t0:performance.now()};}catch(e){}if(window.triggerMidiVuActivity){window.triggerMidiVuActivity((st.parent_tab_id&&st.parent_tab_id.startsWith('session_')?'_sess_':'')+st.trackId,100);}const kbNative=isStandaloneSf()&&isSfTrackEngine(kbCtx.synthEngine)&&!(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive());const kbNativeVst=isStandaloneSf()&&isVstTrackEngine(kbCtx.synthEngine)&&!(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive());if(kbNative){playNativeSfNote(kbTrk,pitch,100/127,5000,undefined,'kb_'+st.trackId+'_'+pitch);}else if(kbNativeVst){playNativeVstNote(kbTrk,pitch,100/127,5000,undefined,'kb_'+st.trackId+'_'+pitch);}if(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive()){try{if(window.__ensureBridgeProgram)window.__ensureBridgeProgram(kbTrk?kbTrk.id:0,kbCtx.program,kbCtx.synthEngine);}catch(er){}window.SonicMidiRouter.pushEvent({cmd:'NOTE_ON',channel:kbTrk?kbTrk.id:0,pitch:pitch,velocity:100/127,percussion:!!(kbCtx&&kbCtx.synthEngine&&kbCtx.synthEngine.soundfont_bank===128),live:true});}else if(window.SonicSF&&!kbNative&&!kbNativeVst){// ⚠️ FIX: giữ note theo thời gian bấm phím — durationMs lớn (5s)
 // chỉ là auto-off phòng hờ; mouseup/mouseleave gọi stopNote dừng
 // NGAY (trước đây 500ms → note tự tắt giữa chừng khi giữ phím).
@@ -1301,11 +1301,11 @@ if(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive()){// D1: bridg
 var bTracks=activeTracksRef.current||[];// ARM piano roll (sub-tab isArmed, cuc bo) cung tinh nhu ARM
 // track - preview note tu piano roll tab phai toi track dang
 // edit du track main KHONG ARM (ARM piano roll khong truyen).
-var bPrArmed={};if(_isPrTabNow){try{// V45.25: chi sub-tab PR dang active; khong gom ARM sub-tab khac.
-var _actPrSub=(subTabsRef.current||[]).find(function(s){return s.id===activeTabRef.current;});if(_actPrSub&&_actPrSub.type==='PIANO_ROLL'&&_actPrSub.trackId)bPrArmed[_actPrSub.trackId]=true;}catch(e){}}bTracks.forEach(function(bt){if(_isPrTabNow?!bPrArmed[bt.id]:!bt.isArmed)return;// V45.24: PR preview doc lap voi mute/solo MAIN/SECTION —
+var bPrArmed={};if(_isPrTabNow){try{// V45.27: chi sub-tab PR dang active VA co ARM (isArmed); khong gom ARM sub-tab khac / MAIN.
+var _actPrSub=(subTabsRef.current||[]).find(function(s){return s.id===activeTabRef.current;});if(_actPrSub&&_actPrSub.type==='PIANO_ROLL'&&_actPrSub.isArmed&&_actPrSub.trackId)bPrArmed[_actPrSub.trackId]=true;}catch(e){}}bTracks.forEach(function(bt){if(_isPrTabNow?!bPrArmed[bt.id]:!bt.isArmed)return;// V45.24: PR preview doc lap voi mute/solo MAIN/SECTION —
 // khoi phuc volume track (bo qua mute/solo) khi o PR tab.
-if(_isPrTabNow){try{ensureTrackPrAudible(bt,bTracks,activeTrackNodesRef.current[bt.id]);}catch(e){}}if(window.triggerMidiVuActivity){window.triggerMidiVuActivity(bt.id,scaledVel);}try{heldMidiNotesRef.current[bt.id]=(heldMidiNotesRef.current[bt.id]||0)+1;}catch(err){}try{window.SonicMidiRouter.pushEvent({cmd:'NOTE_ON',channel:bt.id,pitch:pitch,velocity:scaledVel/127,percussion:!!(bt.synth_engine&&bt.synth_engine.soundfont_bank===128),live:true});}catch(e){}});}else if(window.SonicSF){var allTracks=activeTracksRef.current||[];var arSubs=[];// V45.25: chi sub-tab PR dang active; khong gom ARM sub-tab khac.
-if(_isPrTabNow&&subTabsRef&&subTabsRef.current){var _actPrSub=subTabsRef.current.find(function(s){return s.id===activeTabRef.current;});if(_actPrSub&&_actPrSub.type==='PIANO_ROLL'&&_actPrSub.trackId)arSubs.push(_actPrSub);}var armedTracks=_isPrTabNow?[]:allTracks.filter(function(t){return t.isArmed;});// Piano Roll arming has priority: route to each armed sub-tab's parent track
+if(_isPrTabNow){try{ensureTrackPrAudible(bt,bTracks,activeTrackNodesRef.current[bt.id]);}catch(e){}}if(window.triggerMidiVuActivity){window.triggerMidiVuActivity(bt.id,scaledVel);}try{heldMidiNotesRef.current[bt.id]=(heldMidiNotesRef.current[bt.id]||0)+1;}catch(err){}try{window.SonicMidiRouter.pushEvent({cmd:'NOTE_ON',channel:bt.id,pitch:pitch,velocity:scaledVel/127,percussion:!!(bt.synth_engine&&bt.synth_engine.soundfont_bank===128),live:true});}catch(e){}});}else if(window.SonicSF){var allTracks=activeTracksRef.current||[];var arSubs=[];// V45.27: chi sub-tab PR dang active VA co ARM (isArmed); khong gom ARM sub-tab khac / MAIN.
+if(_isPrTabNow&&subTabsRef&&subTabsRef.current){var _actPrSub=subTabsRef.current.find(function(s){return s.id===activeTabRef.current;});if(_actPrSub&&_actPrSub.type==='PIANO_ROLL'&&_actPrSub.isArmed&&_actPrSub.trackId)arSubs.push(_actPrSub);}var armedTracks=_isPrTabNow?[]:allTracks.filter(function(t){return t.isArmed;});// Piano Roll arming has priority: route to each armed sub-tab's parent track
 if(arSubs.length>0){arSubs.forEach(function(as){var asTrk=allTracks.find(function(t){return t.id===as.trackId;});// V45.24: PR preview doc lap voi mute/solo MAIN/SECTION.
 if(_isPrTabNow&&asTrk){try{ensureTrackPrAudible(asTrk,allTracks,activeTrackNodesRef.current[as.trackId]);}catch(e){}}var asCh=asTrk?assignTrackMidiChannel(asTrk,allTracks):0;var asProg=as.instrumentProgram;var asSe=as.synth_engine;if(window.triggerMidiVuActivity){window.triggerMidiVuActivity(as.trackId,scaledVel);}// Giữ VU theo trường độ: tăng counter note đang giữ
 // (tick giữ peak cho tới khi note-off)
@@ -1803,10 +1803,10 @@ const showToast=(text,type='info',actionText=null,onActionClick=null)=>{if(toast
 const vkbNoteOn=(pitch,vel)=>{try{if(window.__ensureMasteringRouting)window.__ensureMasteringRouting();}catch(er){}const allTracks=activeTracksRef.current||[];// V45.19 Bug 2: ARM piano roll chi tac dung khi DANG o PIANO_ROLL tab. O
 // MAIN/SECTION chi tinh track isArmed that su; ARM tu piano roll KHONG truyen
 // sang. Khong track nao ARM o MAIN/SECTION -> targets rong -> preview cam.
-const _prTabNow=(subTabsRef.current||[]).find(function(s){return s.id===activeTabRef.current;});const _isPrTabNow=!!(_prTabNow&&_prTabNow.type==='PIANO_ROLL');const prArmedIds={};// V45.25: PR tab preview chi track dang edit (sub-tab active) - bat ke ARM.
+const _prTabNow=(subTabsRef.current||[]).find(function(s){return s.id===activeTabRef.current;});const _isPrTabNow=!!(_prTabNow&&_prTabNow.type==='PIANO_ROLL');const prArmedIds={};// V45.27: PR tab preview chi track dang edit (sub-tab active) VA chi khi sub-tab do ARM (isArmed).
 // ARM tu sub-tab PR khac / track MAIN KHONG leak sang PR tab nay.
-try{if(_isPrTabNow){if(_prTabNow.trackId)prArmedIds[_prTabNow.trackId]=true;}}catch(e){}const armed=allTracks.filter(function(t){return t.isArmed;});const targets=_isPrTabNow?allTracks.filter(function(t){return prArmedIds[t.id];}):armed.length?armed:[];if(!_isPrTabNow&&!armed.length&&!window.__vkbNoArmToast){window.__vkbNoArmToast=true;showToast('Không có track nào ARM — preview MIDI câm (MAIN/SECTION).','info');}// DIAG Bug 3/4 (preview khong am): trang thai routing tai note-on.
-try{let _pdDest='none';if(window.AudioRoutingEngine&&window.AudioRoutingEngine._connected){_pdDest=window.AudioRoutingEngine._dest&&window.AudioRoutingEngine._dest.constructor?window.AudioRoutingEngine._dest.constructor.name:'null';_pdDest+='/'+window.AudioRoutingEngine._trackId;}else{_pdDest='NOT_CONNECTED';}const _pdD=window.BridgeAudioNode?window.BridgeAudioNode.getDiag():null;const _pdTab=activeTabRef.current;const _pdSub=subTabsRef.current?(subTabsRef.current.find(s=>s.id===_pdTab)||{}).type:null;_dbgLog('preview_diag','armed='+armed.length+' trg='+targets.length+' prTab='+(_isPrTabNow?1:0)+' tab='+_pdTab+' sub='+(_pdSub||'none')+' play='+(isPlayingRef.current?1:0)+' br='+(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive()?1:0)+' fxRt='+(fxRt.active?1:0)+' dest='+_pdDest+' bd='+(_pdD?'i='+_pdD.initialized+' wl='+_pdD.useWorklet+' nd='+_pdD.hasWorkletNode+' pre='+_pdD.preBufferLen+' ch='+_pdD.chunksLen+' g='+_pdD.gain:'MISSING')+' mb='+!!masterBus);}catch(e){}// DIAG Bug 3/4: arm bo dem audio frames (500ms sau note-on) de biet
+try{if(_isPrTabNow){if(_prTabNow.isArmed&&_prTabNow.trackId)prArmedIds[_prTabNow.trackId]=true;}}catch(e){}const armed=allTracks.filter(function(t){return t.isArmed;});const targets=_isPrTabNow?allTracks.filter(function(t){return prArmedIds[t.id];}):armed.length?armed:[];if(!_isPrTabNow&&!armed.length&&!window.__vkbNoArmToast){window.__vkbNoArmToast=true;showToast('Không có track nào ARM — preview MIDI câm (MAIN/SECTION).','info');}// DIAG Bug 3/4 (preview khong am): trang thai routing tai note-on.
+try{let _pdDest='none';if(window.AudioRoutingEngine&&window.AudioRoutingEngine._connected){_pdDest=window.AudioRoutingEngine._dest&&window.AudioRoutingEngine._dest.constructor?window.AudioRoutingEngine._dest.constructor.name:'null';_pdDest+='/'+window.AudioRoutingEngine._trackId;}else{_pdDest='NOT_CONNECTED';}const _pdD=window.BridgeAudioNode?window.BridgeAudioNode.getDiag():null;const _pdTab=activeTabRef.current;const _pdSub=subTabsRef.current?(subTabsRef.current.find(s=>s.id===_pdTab)||{}).type:null;_dbgLog('preview_diag','armed='+armed.length+' trg='+targets.length+' prTab='+(_isPrTabNow?1:0)+' tab='+_pdTab+' sub='+(_pdSub||'none')+' play='+(isPlayingRef.current?1:0)+' br='+(window.SonicMidiRouter&&window.SonicMidiRouter.isBridgeActive()?1:0)+' fxRt='+(fxRt.active?1:0)+' dest='+_pdDest+' bd='+(_pdD?'i='+_pdD.initialized+' wl='+_pdD.useWorklet+' nd='+_pdD.hasWorkletNode+' pre='+_pdD.preBufferLen+' ch='+_pdD.chunksLen+' g='+_pdD.gain+' ws='+(_pdD.ws?_pdD.ws.overruns+'/'+_pdD.ws.underruns:'-'):'MISSING')+' mb='+!!masterBus);}catch(e){}// DIAG Bug 3/4: arm bo dem audio frames (500ms sau note-on) de biet
 // engine co gui audio ve JS khong (tach engine vs JS routing).
 try{window.__dbgPreviewAudioArmed={count:0,nz:0,t0:performance.now()};}catch(e){}activeMidiPitchesRef.current.add(pitch);setActiveMidiPitches(new Set(activeMidiPitchesRef.current));vkbHeldRef.current.add(pitch);targets.forEach(function(t){// V45.24: PR preview doc lap voi mute/solo MAIN/SECTION — khoi phuc
 // volume track khi o PR tab.
@@ -1996,7 +1996,7 @@ fxRtTrackReconcile(trackId,node,track);}catch(e){console.warn('rebuildTrackFxGra
 // Cần activeTrackNodesRef/isPlayingRef. Session giống master (fxRtStart):
 // fetch start → AudioWorkletNode 'sf-fx-realtime' → WS; WS open → splice
 // worklet vào chain hiện tại (đọc mods MỚI NHẤT — an toàn với rebuild).
-const fxRtTrackStart=async(trackId,track,path)=>{const key=trackId+':'+path;const chain=fxRtTrackChain(track);if(!chain.length)return;if(fxRtTracks[key]){if(!fxRtTracks[key].node||fxRtTracks[key].node.context!==getAudioContext())fxRtTrackStop(trackId,path,true);else return;}const ctx=getAudioContext();if(!ctx||!ctx.audioWorklet)return;const chainPayload=chain.map(s=>s.type==='vst3'?{type:'vst3',path:s.path,name:s.name||s.path,preset_b64:s.preset_b64||'',bypass:!!s.bypass||!!(track&&track.vstFxBypass)}:{type:'builtin',id:s.type,params:s.params&&Object.keys(s.params).length?s.params:{},bypass:!!s.bypass});let st;try{st=await window.SonicAPI.fxRealtimeStart({fx_chain:chainPayload,sample_rate:ctx.sampleRate||44100});}catch(e){console.warn('[FX RT track] start fail',trackId,path,e);return;}const entry={sessionId:st.session_id,ws:null,node:null,ready:false,path,spliced:null,chainKey:fxRtTrackChainKey(chain)+'|vb:'+(track&&track.vstFxBypass?'1':'0'),paramsBySlot:chain.map(s=>fxRtEntryParams(s,null)),inQueue:[],pumpTimer:null,lastInSent:0,flushing:false,flushTimer:null};fxRtTracks[key]=entry;fxRtGuiPushShm();try{await ctx.audioWorklet.addModule(`${API_BASE_URL}/static/js/sf-fx-realtime.js?v=202608311756`);const node=new AudioWorkletNode(ctx,'sf-fx-realtime',{numberOfInputs:1,numberOfOutputs:1,outputChannelCount:[2]});entry.node=node;const u=new URL(API_BASE_URL);const wsProto=u.protocol==='https:'?'wss://':'ws://';// WS to 'localhost' bi tre ~300ms (Chromium thu ::1 truoc roi fallback) - dung 127.0.0.1
+const fxRtTrackStart=async(trackId,track,path)=>{const key=trackId+':'+path;const chain=fxRtTrackChain(track);if(!chain.length)return;if(fxRtTracks[key]){if(!fxRtTracks[key].node||fxRtTracks[key].node.context!==getAudioContext())fxRtTrackStop(trackId,path,true);else return;}const ctx=getAudioContext();if(!ctx||!ctx.audioWorklet)return;const chainPayload=chain.map(s=>s.type==='vst3'?{type:'vst3',path:s.path,name:s.name||s.path,preset_b64:s.preset_b64||'',bypass:!!s.bypass||!!(track&&track.vstFxBypass)}:{type:'builtin',id:s.type,params:s.params&&Object.keys(s.params).length?s.params:{},bypass:!!s.bypass});let st;try{st=await window.SonicAPI.fxRealtimeStart({fx_chain:chainPayload,sample_rate:ctx.sampleRate||44100});}catch(e){console.warn('[FX RT track] start fail',trackId,path,e);return;}const entry={sessionId:st.session_id,ws:null,node:null,ready:false,path,spliced:null,chainKey:fxRtTrackChainKey(chain)+'|vb:'+(track&&track.vstFxBypass?'1':'0'),paramsBySlot:chain.map(s=>fxRtEntryParams(s,null)),inQueue:[],pumpTimer:null,lastInSent:0,flushing:false,flushTimer:null};fxRtTracks[key]=entry;fxRtGuiPushShm();try{await ctx.audioWorklet.addModule(`${API_BASE_URL}/static/js/sf-fx-realtime.js?v=202608311809`);const node=new AudioWorkletNode(ctx,'sf-fx-realtime',{numberOfInputs:1,numberOfOutputs:1,outputChannelCount:[2]});entry.node=node;const u=new URL(API_BASE_URL);const wsProto=u.protocol==='https:'?'wss://':'ws://';// WS to 'localhost' bi tre ~300ms (Chromium thu ::1 truoc roi fallback) - dung 127.0.0.1
 const wsHost=u.hostname==='localhost'||u.hostname==='::1'?'127.0.0.1'+(u.port?':'+u.port:''):u.host;const tok=localStorage.getItem('sonic_token')||'';const ws=new WebSocket(`${wsProto}${wsHost}${st.ws_url}${tok?'?token='+encodeURIComponent(tok):''}`);entry.ws=ws;ws.binaryType='arraybuffer';ws.onopen=()=>{entry.ready=true;entry.inQueue=[];// bỏ audio stale trước khi WS open — hết lag khởi đầu
 fxRtTrackSplice(trackId,path);try{(entry.paramsBySlot||[]).forEach((pl,slot)=>pl.forEach(p=>ws.send(JSON.stringify({cmd:'set_param',slot,key:p.key,value:p.value}))));}catch(e){}};ws.onmessage=ev=>{if(typeof ev.data==='string'){try{const d=JSON.parse(ev.data);if(d&&d.cmd==='flush_done'){entry.flushing=false;if(entry.flushTimer){clearTimeout(entry.flushTimer);entry.flushTimer=null;}if(entry.node)entry.node.port.postMessage({type:'flush_done'});}}catch(e){}return;}if(!(ev.data instanceof ArrayBuffer)||!entry.node)return;if(entry.flushing)return;// V24: output stale trong luc flush — drop
 const f=new Float32Array(ev.data);const half=f.length/2;const l=new Float32Array(half);const r=new Float32Array(half);for(let i=0;i<half;i++){l[i]=f[i*2];r[i]=f[i*2+1];}entry.node.port.postMessage({type:'out',l,r});};ws.onclose=()=>fxRtTrackStop(trackId,path,true);ws.onerror=()=>{try{ws.close();}catch(e){}};entry.node.port.onmessage=ev=>{const d=ev.data;if(!d||!entry.ws)return;if(d.type==='flush'){// V24: nhu master — worklet underrun-resume → flush engine ring

app/static/js/services/bridgeAudioNode.js

@@ -16,6 +16,7 @@
   var _ctx = null;
   var _initialized = false;
   var _useWorklet = false;
+  var _workletStats = null; // stats tu worklet (overrun/underrun) — getDiag
   var _dest = null; // destination gain node da noi (chong connect trung)
 
   function _getCtx() {
@@ -31,7 +32,7 @@
       console.warn('[BridgeAudioNode] AudioWorklet unavailable — ScriptProcessor fallback');
       return false;
     }
-    var url = '/static/js/services/bridgeAudioWorklet.js?v=202608291200';
+    var url = '/static/js/services/bridgeAudioWorklet.js?v=202608311809';
     _ctx.audioWorklet.addModule(url).then(function () {
       if (!_initialized) return; // disconnect() happened while loading
       if (_useWorklet) return;   // already set up (init retry)
@@ -42,6 +43,9 @@
           outputChannelCount: [2]
         });
         _workletNode.connect(_gainNode);
+        _workletNode.port.onmessage = function (ev) {
+          if (ev.data && ev.data.type === 'stats') _workletStats = ev.data;
+        };
         _useWorklet = true;
         // drain pre-buffer into worklet (order preserved)
         while (_preBuffer.length) {
@@ -168,7 +172,8 @@
         hasWorkletNode: !!_workletNode,
         preBufferLen: _preBuffer.length,
         chunksLen: _chunks.length,
-        gain: _gainNode ? _gainNode.gain.value : -1
+        gain: _gainNode ? _gainNode.gain.value : -1,
+        ws: _workletStats
       };
     }
   };

app/static/js/services/bridgeAudioWorklet.js

@@ -1,23 +1,29 @@
 // app/static/js/services/bridgeAudioWorklet.js
 // VSTi crackle fix: audio sink chay tren audio thread (khong jank main thread).
-// - Ring block 256 mau, toi da 16 block (~85ms @48k) — hap thu jitter pump
-//   (option 2: 8->16 de dung tremolo crackle; backlog lon hon ~85ms)
-//   nhung gioi han backlog: 64 block (~371ms) tao tre ~0.3-0.4s khi play/
-//   keyboard preview (audio moi phai cho ring cu chay het).
+// - Ring block 256 mau, toi da 32 block (~170ms @48k) — hap thu jitter pump
+//   (V45.27: 16->32 de dung crackle VST2 loop/tremolo — render loop C++ bi
+//   stall khi instrument xu li loop/tremolo nang CPU; 8->16 truoc do da dung
+//   tremolo crackle, 16 van chua du cho stall >85ms). Flush o play start
+//   (app.jsx) xoa ring nen do tre khong tang: ring thuong can o preview.
 // - Underrun: fade ve 0 thay vi click (hard silence).
 // - Resume sau silence: fade vao tu 0.
 // - Overrun: drop block cu nhat + crossfade 64 mau tai diem drop (het click).
+// - Stats: dem overrun/underrun, gui ve main thread moi ~0.5s — kiem tra
+//   con crackle nao la do ring can (underrun) hay ring tran (overrun).
 class BridgeAudioSinkProcessor extends AudioWorkletProcessor {
   constructor() {
     super();
     this._ring = [];
-    this._MAX = 16;
+    this._MAX = 32;
     this._gain = 1.0;
     this._lastOutL = 0.0;
     this._lastOutR = 0.0;
     this._skipFade = 0;      // >0: crossfade dang chay sau overrun drop
     this._skipFromL = 0.0;
     this._skipFromR = 0.0;
+    this._wasUnderrun = false;
+    this._statAccum = 0;
+    this._stats = { overruns: 0, underruns: 0 };
     this.port.onmessage = (e) => {
       const m = e.data;
       if (!m) return;
@@ -27,6 +33,7 @@ class BridgeAudioSinkProcessor extends AudioWorkletProcessor {
           // overrun: bo block cu nhat; lan consume toi se crossfade ranh gioi
           this._ring.shift();
           this._skipFade = 64;
+          this._stats.overruns++;
         }
       } else if (m.type === 'flush') {
         this._ring.length = 0;
@@ -44,6 +51,7 @@ class BridgeAudioSinkProcessor extends AudioWorkletProcessor {
     let w = 0;
     while (w < n) {
       if (this._ring.length) {
+        if (this._wasUnderrun) this._wasUnderrun = false;
         const blk = this._ring[0];
         const avail = blk.l.length;
         const take = Math.min(avail, n - w);
@@ -71,7 +79,8 @@ class BridgeAudioSinkProcessor extends AudioWorkletProcessor {
           blk.r = blk.r.subarray(take);
         }
       } else {
-        // underrun: fade ve 0 (khong click)
+        // underrun: fade ve 0 (khong click) — dem 1 lan moi lan roi vao trang thai trong
+        if (!this._wasUnderrun) { this._wasUnderrun = true; this._stats.underruns++; }
         for (let i = w; i < n; i++) {
           this._gain = Math.max(0, this._gain - 1.0 / 256.0);
           L[i] = this._lastOutL * this._gain;
@@ -82,6 +91,20 @@ class BridgeAudioSinkProcessor extends AudioWorkletProcessor {
         w = n;
       }
     }
+    // Stats: gui ve main thread moi ~0.5s (24000 mau @48k) — log overrun/underrun
+    this._statAccum += n;
+    if (this._statAccum >= 24000) {
+      this._statAccum = 0;
+      try {
+        this.port.postMessage({
+          type: 'stats',
+          overruns: this._stats.overruns,
+          underruns: this._stats.underruns,
+          ring: this._ring.length,
+          max: this._MAX
+        });
+      } catch (e) {}
+    }
     return true;
   }
 }

app/templates/index.html

@@ -40,7 +40,7 @@
     <script src="/static/js/services/soundfontStorage.js?v=202608290945"></script>
     <script src="/static/js/services/soundfontPlayer.js?v=202608290945"></script>
     <script src="/static/js/services/nativeBridgeService.js?v=202608291510"></script>
-    <script src="/static/js/services/bridgeAudioNode.js?v=202608290945"></script>
+    <script src="/static/js/services/bridgeAudioNode.js?v=202608311809"></script>
     <script src="/static/js/services/unifiedMidiRouter.js?v=202608311756"></script>
     <script src="/static/js/services/audioRoutingEngine.js?v=202608290945"></script>
     <script src="/static/js/services/aiGateway.js?v=202608290945"></script>
@@ -51,7 +51,7 @@
     <script src="/static/js/services/promptTemplateManager.js?v=202608290945"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202608290945"></script>
     <script src="/static/js/services/chordTheory.js?v=202608290945"></script>
-    <script src="/static/js/app.precompiled.js?v=202608311756" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608311809" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202608290945">
     <style>
         :root {