diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index 8a3ccd0..1fbdef6 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -9643,6 +9643,44 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
     // ponytail: chi khoi phuc khi project cu co curve; chua hop nhat migration
   }, [notes]);
 
+  // CC lane grid: vẽ cột beat/bar GIỐNG HỆT piano roll (cùng pixelsPerBeat +
+  // snapBeats + timeSigNum) → không lệch khi zoom. snapBeats copy nguyên từ
+  // notes canvas để hai lane trùng khít.
+  const paintCCLaneGrid = (ctx, h) => {
+    let snapBeats = 0.25;
+    if (snapValue === '1') snapBeats = 1.0;
+    else if (snapValue === '1/2') snapBeats = 0.5;
+    else if (snapValue === '1/4') snapBeats = 0.25;
+    else if (snapValue === '1/8') snapBeats = 0.125;
+    else if (snapValue === '1/16') snapBeats = 0.0625;
+    else if (snapValue === '4') snapBeats = 4.0;
+    else if (snapValue === '1/32') snapBeats = 0.03125;
+    for (let beat = 0; beat <= viewBeats; beat += snapBeats) {
+      const x = beat * pixelsPerBeat;
+      if (x > viewWidth) break;
+      const isBar = beat % timeSigNum === 0;
+      ctx.strokeStyle = isBar ? '#444450' : '#2d2d35';
+      ctx.lineWidth = isBar ? 1.2 : 0.6;
+      ctx.beginPath();
+      ctx.moveTo(x, 0);
+      ctx.lineTo(x, h);
+      ctx.stroke();
+    }
+  };
+  // Nhan 0/+-: CC 0=min (velocity, expression...) ghi "0" o day; CC luong cuc
+  // (pan) ghi "+" dinh, "0" giua, "-" day.
+  const paintCCLaneZeroLabel = (ctx, h, bipolar) => {
+    ctx.fillStyle = '#8b8b95';
+    ctx.font = '10px sans-serif';
+    if (bipolar) {
+      ctx.fillText('+', 5, 12);
+      ctx.fillText('0', 5, h / 2 + 3);
+      ctx.fillText('-', 5, h - 5);
+    } else {
+      ctx.fillText('0', 5, h - 5);
+    }
+  };
+
   // Ve CC11 lane (graph thread). Tach rieng de drag ve preview truc tiep
   // (truoc day setNotes tung mousemove + doc notes tu closure stale -> node
   // cu/moi xen ke -> flicker). previewNoteId != null: chi ve note do voi
@@ -9658,12 +9696,15 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
     ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
     ctx.fillStyle = '#161616';
     ctx.fillRect(0, 0, viewWidth, h);
-    ctx.strokeStyle = '#252525';
+    paintCCLaneGrid(ctx, h);
+    // CC11 0=min → ghi "0" o day (khong ve duong giua nua).
+    ctx.strokeStyle = '#2f2f38';
     ctx.lineWidth = 1;
     ctx.beginPath();
-    ctx.moveTo(0, h / 2);
-    ctx.lineTo(viewWidth, h / 2);
+    ctx.moveTo(0, h - 10);
+    ctx.lineTo(viewWidth, h - 10);
     ctx.stroke();
+    paintCCLaneZeroLabel(ctx, h, false);
     const yOf = v => h - ((v / 127) * (h - 20) + 10);
     if (notes.length === 0) return;
     let minS = Infinity, maxE = -Infinity;
@@ -9719,13 +9760,27 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
 
     ctx.fillStyle = '#161616';
     ctx.fillRect(0, 0, viewWidth, h);
+    paintCCLaneGrid(ctx, h);
 
-    ctx.strokeStyle = '#252525';
-    ctx.lineWidth = 1;
-    ctx.beginPath();
-    ctx.moveTo(0, h / 2);
-    ctx.lineTo(viewWidth, h / 2);
-    ctx.stroke();
+    if (ccMode === 'pan') {
+      // Luong cuc: 0 o giua (+ dinh / - day) — giu nguyen nhu cu.
+      ctx.strokeStyle = '#252525';
+      ctx.lineWidth = 1;
+      ctx.beginPath();
+      ctx.moveTo(0, h / 2);
+      ctx.lineTo(viewWidth, h / 2);
+      ctx.stroke();
+      paintCCLaneZeroLabel(ctx, h, true);
+    } else {
+      // 0=min: ve duong day tai gia tri 0 + nhan "0".
+      ctx.strokeStyle = '#2f2f38';
+      ctx.lineWidth = 1;
+      ctx.beginPath();
+      ctx.moveTo(0, h - 10);
+      ctx.lineTo(viewWidth, h - 10);
+      ctx.stroke();
+      paintCCLaneZeroLabel(ctx, h, false);
+    }
 
     if (ccMode === 'cc11') {
       // CC11 expression: graph thread cho note dang chon; khi dang drag ve
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 6ea0f80..84963f8 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -745,12 +745,20 @@ const[showCC,setShowCC]=React.useState(true);const[ccHeight,setCcHeight]=React.u
 // sinh lai per-note expression_curve (engine doc per-note) bang cach sample
 // global tai vung tung note.
 const[cc11GlobalCurve,setCc11GlobalCurve]=React.useState([]);React.useEffect(()=>{if(cc11GlobalCurve&&cc11GlobalCurve.length)return;const n=notes.find(x=>Array.isArray(x.expression_curve)&&x.expression_curve.length);if(n)setCc11GlobalCurve(n.expression_curve.slice());// ponytail: chi khoi phuc khi project cu co curve; chua hop nhat migration
-},[notes]);// Ve CC11 lane (graph thread). Tach rieng de drag ve preview truc tiep
+},[notes]);// CC lane grid: vẽ cột beat/bar GIỐNG HỆT piano roll (cùng pixelsPerBeat +
+// snapBeats + timeSigNum) → không lệch khi zoom. snapBeats copy nguyên từ
+// notes canvas để hai lane trùng khít.
+const paintCCLaneGrid=(ctx,h)=>{let snapBeats=0.25;if(snapValue==='1')snapBeats=1.0;else if(snapValue==='1/2')snapBeats=0.5;else if(snapValue==='1/4')snapBeats=0.25;else if(snapValue==='1/8')snapBeats=0.125;else if(snapValue==='1/16')snapBeats=0.0625;else if(snapValue==='4')snapBeats=4.0;else if(snapValue==='1/32')snapBeats=0.03125;for(let beat=0;beat<=viewBeats;beat+=snapBeats){const x=beat*pixelsPerBeat;if(x>viewWidth)break;const isBar=beat%timeSigNum===0;ctx.strokeStyle=isBar?'#444450':'#2d2d35';ctx.lineWidth=isBar?1.2:0.6;ctx.beginPath();ctx.moveTo(x,0);ctx.lineTo(x,h);ctx.stroke();}};// Nhan 0/+-: CC 0=min (velocity, expression...) ghi "0" o day; CC luong cuc
+// (pan) ghi "+" dinh, "0" giua, "-" day.
+const paintCCLaneZeroLabel=(ctx,h,bipolar)=>{ctx.fillStyle='#8b8b95';ctx.font='10px sans-serif';if(bipolar){ctx.fillText('+',5,12);ctx.fillText('0',5,h/2+3);ctx.fillText('-',5,h-5);}else{ctx.fillText('0',5,h-5);}};// Ve CC11 lane (graph thread). Tach rieng de drag ve preview truc tiep
 // (truoc day setNotes tung mousemove + doc notes tu closure stale -> node
 // cu/moi xen ke -> flicker). previewNoteId != null: chi ve note do voi
 // previewCurve thay cho expression_curve da commit.
-const paintCC11Lane=previewCurve=>{const canvas=ccCanvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const dpr=window.devicePixelRatio||1;const h=ccHeight;canvas.width=viewWidth*dpr;canvas.height=h*dpr;ctx.setTransform(dpr,0,0,dpr,0,0);ctx.fillStyle='#161616';ctx.fillRect(0,0,viewWidth,h);ctx.strokeStyle='#252525';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(0,h/2);ctx.lineTo(viewWidth,h/2);ctx.stroke();const yOf=v=>h-(v/127*(h-20)+10);if(notes.length===0)return;let minS=Infinity,maxE=-Infinity;notes.forEach(n=>{minS=Math.min(minS,n.start_beat);maxE=Math.max(maxE,n.start_beat+(n.duration_beats||1));});const x0=(renderBeatOffset+minS)*pixelsPerBeat;const x1=(renderBeatOffset+maxE)*pixelsPerBeat;// Dashed lien tuc tu note dau den note cuoi (default line)
-ctx.strokeStyle='#2f6b57';ctx.lineWidth=1.5;ctx.setLineDash([4,4]);ctx.beginPath();ctx.moveTo(x0,yOf(127));ctx.lineTo(x1,yOf(127));ctx.stroke();ctx.setLineDash([]);const curve=(previewCurve||cc11GlobalCurve||[]).slice().sort((a,b)=>a.position_ratio-b.position_ratio);if(!curve.length)return;ctx.strokeStyle='#34d399';ctx.lineWidth=2;ctx.beginPath();if(curve.length===1){ctx.moveTo(x0,yOf(curve[0].value));ctx.lineTo(x1,yOf(curve[0].value));}else{curve.forEach((p,i)=>{const x=x0+p.position_ratio*(x1-x0);const y=yOf(p.value);if(i===0)ctx.moveTo(x,y);else ctx.lineTo(x,y);});}ctx.stroke();curve.forEach(p=>{const x=x0+p.position_ratio*(x1-x0);ctx.fillStyle='#a7f3d0';ctx.beginPath();ctx.arc(x,yOf(p.value),4,0,2*Math.PI);ctx.fill();});};React.useLayoutEffect(()=>{const canvas=ccCanvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const dpr=window.devicePixelRatio||1;const h=ccHeight;canvas.width=viewWidth*dpr;canvas.height=h*dpr;ctx.scale(dpr,dpr);ctx.fillStyle='#161616';ctx.fillRect(0,0,viewWidth,h);ctx.strokeStyle='#252525';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(0,h/2);ctx.lineTo(viewWidth,h/2);ctx.stroke();if(ccMode==='cc11'){// CC11 expression: graph thread cho note dang chon; khi dang drag ve
+const paintCC11Lane=previewCurve=>{const canvas=ccCanvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const dpr=window.devicePixelRatio||1;const h=ccHeight;canvas.width=viewWidth*dpr;canvas.height=h*dpr;ctx.setTransform(dpr,0,0,dpr,0,0);ctx.fillStyle='#161616';ctx.fillRect(0,0,viewWidth,h);paintCCLaneGrid(ctx,h);// CC11 0=min → ghi "0" o day (khong ve duong giua nua).
+ctx.strokeStyle='#2f2f38';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(0,h-10);ctx.lineTo(viewWidth,h-10);ctx.stroke();paintCCLaneZeroLabel(ctx,h,false);const yOf=v=>h-(v/127*(h-20)+10);if(notes.length===0)return;let minS=Infinity,maxE=-Infinity;notes.forEach(n=>{minS=Math.min(minS,n.start_beat);maxE=Math.max(maxE,n.start_beat+(n.duration_beats||1));});const x0=(renderBeatOffset+minS)*pixelsPerBeat;const x1=(renderBeatOffset+maxE)*pixelsPerBeat;// Dashed lien tuc tu note dau den note cuoi (default line)
+ctx.strokeStyle='#2f6b57';ctx.lineWidth=1.5;ctx.setLineDash([4,4]);ctx.beginPath();ctx.moveTo(x0,yOf(127));ctx.lineTo(x1,yOf(127));ctx.stroke();ctx.setLineDash([]);const curve=(previewCurve||cc11GlobalCurve||[]).slice().sort((a,b)=>a.position_ratio-b.position_ratio);if(!curve.length)return;ctx.strokeStyle='#34d399';ctx.lineWidth=2;ctx.beginPath();if(curve.length===1){ctx.moveTo(x0,yOf(curve[0].value));ctx.lineTo(x1,yOf(curve[0].value));}else{curve.forEach((p,i)=>{const x=x0+p.position_ratio*(x1-x0);const y=yOf(p.value);if(i===0)ctx.moveTo(x,y);else ctx.lineTo(x,y);});}ctx.stroke();curve.forEach(p=>{const x=x0+p.position_ratio*(x1-x0);ctx.fillStyle='#a7f3d0';ctx.beginPath();ctx.arc(x,yOf(p.value),4,0,2*Math.PI);ctx.fill();});};React.useLayoutEffect(()=>{const canvas=ccCanvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const dpr=window.devicePixelRatio||1;const h=ccHeight;canvas.width=viewWidth*dpr;canvas.height=h*dpr;ctx.scale(dpr,dpr);ctx.fillStyle='#161616';ctx.fillRect(0,0,viewWidth,h);paintCCLaneGrid(ctx,h);if(ccMode==='pan'){// Luong cuc: 0 o giua (+ dinh / - day) — giu nguyen nhu cu.
+ctx.strokeStyle='#252525';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(0,h/2);ctx.lineTo(viewWidth,h/2);ctx.stroke();paintCCLaneZeroLabel(ctx,h,true);}else{// 0=min: ve duong day tai gia tri 0 + nhan "0".
+ctx.strokeStyle='#2f2f38';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(0,h-10);ctx.lineTo(viewWidth,h-10);ctx.stroke();paintCCLaneZeroLabel(ctx,h,false);}if(ccMode==='cc11'){// CC11 expression: graph thread cho note dang chon; khi dang drag ve
 // preview tu ccDragRef (khong phu thuoc state da commit).
 const drag=ccDragRef.current;if(drag&&drag.mode==='cc11'&&drag.previewCurve){paintCC11Lane(drag.previewCurve);}else{paintCC11Lane();}return;}else{notes.forEach(note=>{const x=(renderBeatOffset+note.start_beat)*pixelsPerBeat;const isSelected=selectedNoteIds.includes(note.id);let val=note.velocity!==undefined?note.velocity:0.8;if(ccMode==='pan'){val=(note.pan!==undefined?note.pan:0.0)*0.5+0.5;}const stemH=val*(h-20)+10;const y=h-stemH;ctx.strokeStyle=ccMode==='pan'?isSelected?'#60a5fa':'#a78bfa':isSelected?'#3b82f6':'#fbbf24';ctx.lineWidth=2.5;ctx.beginPath();ctx.moveTo(x,h);ctx.lineTo(x,y);ctx.stroke();ctx.fillStyle=ccMode==='pan'?isSelected?'#3b82f6':'#c084fc':isSelected?'#3b82f6':'#fbbf24';ctx.beginPath();ctx.arc(x,y,3.5,0,2*Math.PI);ctx.fill();});}},[notes,ccMode,rollZoom,viewWidth,selectedNoteIds,renderBeatOffset,ccHeight,showCC]);// Follow playhead: khi PLAY — playhead luôn ở GIỮA view, notes trôi sang
 // trái (scroll theo st.currentTime); khi STOP — scroll về đầu (playhead ở
diff --git a/app/templates/index.html b/app/templates/index.html
index 031aa28..b261919 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -51,7 +51,7 @@
     <script src="/static/js/services/promptTemplateManager.js?v=202607281039"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202607290941"></script>
     <script src="/static/js/services/chordTheory.js?v=202608211300"></script>
-    <script src="/static/js/app.precompiled.js?v=202608291100" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608291900" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {
diff --git a/native_bridge/src/Vst3Instrument.cpp b/native_bridge/src/Vst3Instrument.cpp
index 97415c8..f2ac0cf 100644
--- a/native_bridge/src/Vst3Instrument.cpp
+++ b/native_bridge/src/Vst3Instrument.cpp
@@ -76,6 +76,8 @@ using Steinberg::Vst::ParamID;
 using Steinberg::Vst::ParamValue;
 using Steinberg::Vst::IMidiMapping;
 using Steinberg::Vst::IParamValueQueue;
+using Steinberg::Vst::ParameterInfo;
+using Steinberg::Vst::TChar;
 using Steinberg::Vst::kNoParamId;
 using Steinberg::Vst::BusInfo;
 using Steinberg::Vst::kAudio;
@@ -154,6 +156,11 @@ struct Vst3HostState {
     // every overlapping voice gets a unique id and note-off releases them all.
     int32 nextNoteId = 1;
     std::vector<int32> noteIdsByPitch[128];
+    // CC → plugin param tag cache for the no-IMidiMapping volume fallback
+    // (scanVolumeParam). 0 = unresolved; kNoParamId = no matching param.
+    bool ccParamResolved[128] = {};
+    bool ccLogged[128] = {};
+    ParamID ccParamTag[128] = {};
 };
 
 // Resolve the plugin's ParamID for a MIDI CC / pitch-bend, preferring the
@@ -173,6 +180,39 @@ ParamID midiControllerTag(IPtr<IEditController>& controller, int16 channel,
     return legacyTag;
 }
 
+// Case-insensitive substring match of an ASCII token on a UTF-16 SDK string.
+bool titleContains(const TChar* s, const char* token) {
+    for (int i = 0; i < 127 && s[i] != 0; ++i) {
+        int j = 0;
+        for (; token[j]; ++j) {
+            if (i + j >= 127 || s[i + j] == 0) break;
+            char c = (char)(s[i + j] & 0x7F);
+            if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
+            if (c != token[j]) break;
+        }
+        if (token[j] == 0) return true;
+    }
+    return false;
+}
+
+// No-IMidiMapping fallback: scan the controller's parameter list for the
+// first volume/gain/output/level/master param (priority order) and use its
+// tag for CC 7/11. Plugins without mapping ignore the legacy kHostMidiCC
+// tags, so CC volume curves die there without this scan.
+ParamID scanVolumeParam(IPtr<IEditController>& controller) {
+    if (!controller) return kNoParamId;
+    static const char* tokens[] = {"volume", "gain", "output", "level", "master"};
+    int32 count = controller->getParameterCount();
+    for (int32 i = 0; i < count; ++i) {
+        ParameterInfo info = {};
+        if (controller->getParameterInfo(i, info) != kResultOk) continue;
+        for (const char* t : tokens) {
+            if (titleContains(info.title, t)) return info.id;
+        }
+    }
+    return kNoParamId;
+}
+
 }  // namespace
 #endif
 
@@ -474,7 +514,22 @@ void Vst3Instrument::controlChange(uint32_t channel, uint32_t cc, uint32_t value
     auto* s = static_cast<Vst3HostState*>(state_);
     if (!s || !s->controller) return;
     ParamID tag = midiControllerTag(s->controller, 0, (int16)cc,
-                                    kHostMidiCC);
+                                    kHostMidiCC + cc);
+    // IMidiMapping absent (common): plugin cannot resolve kHostMidiCC+cc, so
+    // fall back to a scanned volume param (resolved once per CC).
+    if (cc < 128 && tag == kHostMidiCC + cc && !s->ccParamResolved[cc]) {
+        s->ccParamResolved[cc] = true;
+        s->ccParamTag[cc] = scanVolumeParam(s->controller);
+        std::cerr << "[midi] cc=" << cc << " no IMidiMapping → volume-param tag=0x"
+                  << std::hex << s->ccParamTag[cc] << std::dec << std::endl;
+    }
+    if (cc < 128 && tag == kHostMidiCC + cc) tag = s->ccParamTag[cc];
+    if (cc < 128 && !s->ccLogged[cc]) {
+        s->ccLogged[cc] = true;
+        std::cerr << "[midi] cc=" << cc << " tag=0x" << std::hex << tag
+                  << std::dec << " v=" << value << std::endl;
+    }
+    if (tag == kNoParamId) return;
     ParamValue v = value / 127.0;
     // setParamNormalized covers single-component plugins; the param queue
     // reaches split plugins that read inputParameterChanges inside process().
diff --git a/src-tauri/binaries/daw_vst_bridge-x86_64-pc-windows-msvc.exe b/src-tauri/binaries/daw_vst_bridge-x86_64-pc-windows-msvc.exe
index a9ad3ab..b8d03d4 100644
Binary files a/src-tauri/binaries/daw_vst_bridge-x86_64-pc-windows-msvc.exe and b/src-tauri/binaries/daw_vst_bridge-x86_64-pc-windows-msvc.exe differ
diff --git a/src-tauri/binaries/daw_vst_bridge.exe b/src-tauri/binaries/daw_vst_bridge.exe
index 4da42eb..b8d03d4 100644
Binary files a/src-tauri/binaries/daw_vst_bridge.exe and b/src-tauri/binaries/daw_vst_bridge.exe differ