From ba7c03ca5efe0a755eb21230c599c5e83f042a00 Mon Sep 17 00:00:00 2001
From: locphamtran <tranloclqd@gmail.com>
Date: Mon, 24 Aug 2026 22:02:31 +0700
Subject: [PATCH] =?UTF-8?q?fix:=20bounce=20silent=20=E2=80=94=20AudioRouti?=
 =?UTF-8?q?ngEngine=20no=20longer=20full-tears-down=20sink=20on=20dest=20c?=
 =?UTF-8?q?hange?=
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Content-Type: text/plain; charset=UTF-8
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stopAllPlayback->updateSfRouting->startTrackPlayback reroutes bridge sink
twice during bounce; each dest change previously called this.disconnect()
= BridgeAudioNode teardown + async worklet reload, audio swallowed into
_preBuffer (bounded 64 blocks) forever if worklet never reactivates ->
silent WAV (only old reverb tail). Fix: rely on BridgeAudioNode.connect()
re-pointing _gainNode (already handles dest switch without teardown);
init() only when not ready. Add __sfDiag ROUTE + BRIDGE_AUDIO (frames/
peak/path per sec) to verify at bounce end.
---
 app/static/js/services/audioRoutingEngine.js |  2 +-
 app/static/js/services/bridgeAudioNode.js    | 10 ++++++++++
 app/templates/index.html                     |  4 ++--
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/app/static/js/services/audioRoutingEngine.js b/app/static/js/services/audioRoutingEngine.js
index e25778c..d4e942b 100644
--- a/app/static/js/services/audioRoutingEngine.js
+++ b/app/static/js/services/audioRoutingEngine.js
@@ -24,8 +24,8 @@
       // Idempotent: updateSfRouting/ensureMasteringRouting chay tren MOI keydown/
       // note-on — neu da noi dung dest thi KHONG disconnect (disconnect flush ring
       // -> am phim dang vang bi cat). Chi doi khi dest/track thuc su khac.
+      if (window.__sfDiag) window.__sfDiag("ROUTE to=" + (trackId || "masterBus") + " prev=" + (this._trackId || "masterBus") + " bridgeReady=" + bridgeNode.isReady() + " conn=" + this._connected);
       if (this._connected && this._dest === dest && this._trackId === (trackId || null)) return true;
-      this.disconnect();
       if (!bridgeNode.isReady()) bridgeNode.init();
       bridgeNode.connect(dest);
       this._connected = true;
diff --git a/app/static/js/services/bridgeAudioNode.js b/app/static/js/services/bridgeAudioNode.js
index af6fa6b..7534a31 100644
--- a/app/static/js/services/bridgeAudioNode.js
+++ b/app/static/js/services/bridgeAudioNode.js
@@ -101,6 +101,16 @@
   function onAudio(l, r) {
     if (!_initialized) init();
     var blk = { l: new Float32Array(l), r: new Float32Array(r) };
+    _frames = (_frames || 0) + blk.l.length;
+    for (var _i = 0; _i < blk.l.length; _i++) {
+      var _a = Math.abs(blk.l[_i]); if (_a > (_peak || 0)) _peak = _a;
+      var _b = Math.abs(blk.r[_i]); if (_b > (_peak || 0)) _peak = _b;
+    }
+    if (!_lastDiag || Date.now() - _lastDiag >= 1000) {
+      _lastDiag = Date.now();
+      if (window.__sfDiag) window.__sfDiag("BRIDGE_AUDIO frames=" + _frames + " peak=" + (_peak ? (20 * Math.log10(_peak)).toFixed(1) : "-inf") + "dB path=" + (_useWorklet ? "worklet" : (_preBuffer.length ? "preBuffer" : "chunks")));
+      _peak = 0;
+    }
     if (_useWorklet && _workletNode) {
       _workletNode.port.postMessage({ type: 'audio', l: blk.l, r: blk.r });
       return;
diff --git a/app/templates/index.html b/app/templates/index.html
index 2c4b3a3..b4ca918 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -40,9 +40,9 @@
     <script src="/static/js/services/soundfontStorage.js?v=202607271016"></script>
     <script src="/static/js/services/soundfontPlayer.js?v=202608101800"></script>
     <script src="/static/js/services/nativeBridgeService.js?v=202608190001"></script>
-    <script src="/static/js/services/bridgeAudioNode.js?v=202608152200"></script>
+    <script src="/static/js/services/bridgeAudioNode.js?v=202608250107"></script>
     <script src="/static/js/services/unifiedMidiRouter.js?v=202608112200"></script>
-    <script src="/static/js/services/audioRoutingEngine.js?v=202608112200"></script>
+    <script src="/static/js/services/audioRoutingEngine.js?v=202608250107"></script>
     <script src="/static/js/services/aiGateway.js?v=202608037200"></script>
     <script src="/static/js/services/dawCommandDispatcher.js?v=202607271016"></script>
     <script src="/static/js/services/pianoRollTabService.js?v=202607272044"></script>