fix: sửa lỗi di chuyển items
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# Kilo Post-Task Automation Rule
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Mỗi khi bạn (Kilo) hoàn thành một tác vụ viết code, sửa lỗi, hoặc refactor code theo yêu cầu của tôi, bạn BẮT BUỘC phải thực hiện bước cuối cùng sau:
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1. Kiểm tra sự tồn tại của file `wiki.md` ở thư mục gốc (nếu chưa có, hãy tạo mới).
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2. Tự động chèn (append) một đoạn báo cáo ngắn về task vừa hoàn thành vào CUỐI file `wiki.md` theo cấu trúc sau:
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### [YYYY-MM-DD HH:mm] Task: <Tên ngắn gọn của công việc>
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- **Tóm tắt thay đổi:** <Mô tả 1-2 câu về nội dung đã thực hiện>
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- **Các file ảnh hưởng:** `<file_1>`, `<file_2>`
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- **Ghi chú/Test (nếu có):** <Các lưu ý hoặc lệnh chạy test/build nếu có>
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---
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@@ -2,6 +2,8 @@
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Mỗi khi bạn (Kilo) hoàn thành một tác vụ viết code, sửa lỗi, hoặc refactor code theo yêu cầu của tôi, bạn BẮT BUỘC phải thực hiện bước cuối cùng sau:
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**BẮT BUỘC**
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1. Kiểm tra sự tồn tại của file `wiki.md` ở thư mục gốc (nếu chưa có, hãy tạo mới).
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2. Tự động chèn (append) một đoạn báo cáo ngắn về task vừa hoàn thành vào CUỐI file `wiki.md` theo cấu trúc sau:
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{"original_name": "test.sf2", "uuid": "08692ebf-03e7-4c33-b876-36924024215e", "file": "08692ebf-03e7-4c33-b876-36924024215e.sf2"}
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{"original_name": "test.sf2", "uuid": "17b3aa85-855e-40fe-a7db-4117681c4497", "file": "17b3aa85-855e-40fe-a7db-4117681c4497.sf2"}
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{"original_name": "test.sf2", "uuid": "1955f5e5-9986-4b3b-8173-f313b38e4dd9", "file": "1955f5e5-9986-4b3b-8173-f313b38e4dd9.sf2"}
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{"original_name": "test.sf2", "uuid": "3c4f0cfc-ecc4-4ae8-adeb-14c0d04d9e20", "file": "3c4f0cfc-ecc4-4ae8-adeb-14c0d04d9e20.sf2"}
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{"original_name": "test.sf2", "uuid": "3d0a7b50-a640-4fdf-aa02-b1f034206e86", "file": "3d0a7b50-a640-4fdf-aa02-b1f034206e86.sf2"}
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{"original_name": "test.sf2", "uuid": "49d84fdb-ba20-4e7b-b03e-a9e07303df24", "file": "49d84fdb-ba20-4e7b-b03e-a9e07303df24.sf2"}
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{"original_name": "weedsgm3.sf2", "uuid": "518e850f-a5d3-4790-b1f9-0c90c203c524", "file": "518e850f-a5d3-4790-b1f9-0c90c203c524.sf2"}
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{"original_name": "test.sf2", "uuid": "5aeae4f0-6e39-4ffa-b629-727c377326ef", "file": "5aeae4f0-6e39-4ffa-b629-727c377326ef.sf2"}
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{"original_name": "test.sf2", "uuid": "6d1e523e-b9cf-405f-92d0-1b62497554e4", "file": "6d1e523e-b9cf-405f-92d0-1b62497554e4.sf2"}
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{"original_name": "test.sf2", "uuid": "73f52fd7-6812-4485-bbd8-1df3185bc49a", "file": "73f52fd7-6812-4485-bbd8-1df3185bc49a.sf2"}
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{"original_name": "test.sf2", "uuid": "7deec9c7-6567-4502-8ae8-ecbae0ffa3af", "file": "7deec9c7-6567-4502-8ae8-ecbae0ffa3af.sf2"}
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{"original_name": "test.sf2", "uuid": "7faf18bc-d931-4bde-938d-6cc5bb004643", "file": "7faf18bc-d931-4bde-938d-6cc5bb004643.sf2"}
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{"original_name": "7712630e-df7c-4b51-adbc-9a1cb0490907.sf2", "uuid": "7faf5aa0-87dd-4321-b729-7189e2f71bad", "file": "7faf5aa0-87dd-4321-b729-7189e2f71bad.sf2"}
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{"original_name": "test.sf2", "uuid": "9b13be7b-e0b8-411e-8394-7f2851954f87", "file": "9b13be7b-e0b8-411e-8394-7f2851954f87.sf2"}
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{"original_name": "test.sf2", "uuid": "d790737f-40a2-481a-bc7e-5befaf4a8160", "file": "d790737f-40a2-481a-bc7e-5befaf4a8160.sf2"}
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{"original_name": "test.sf2", "uuid": "f5aa67a6-d998-4013-b61a-ff0b6adfe311", "file": "f5aa67a6-d998-4013-b61a-ff0b6adfe311.sf2"}
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# DIAGNOSTIC REPORT: WHY MIDI SIGNAL IS RECEIVED BUT NOT RECORDED / RENDERED
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---
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## 1. Executive Summary & Root Cause Analysis
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Based on the DAW UI screenshot provided, the system is successfully receiving MIDI hardware signals (as indicated by the active VU meter on Track 01 set to `MIDIIN2 (SE49)`), but no MIDI data is being written or displayed on the timeline.
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This issue occurs due to four architectural and state-management gaps in the current implementation.
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---
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## 2. Detailed Root Causes
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### Root Cause 1: Global Transport Record vs. Track Arm Disconnect
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* **Observed State:** Track 01 has its individual Arm `[R]` button active (red indicator ON). However, the Global Transport Record button (red circle on the top toolbar) is inactive/stopped at time position `0:01.951`.
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* **Technical Issue:** Arming a track only enables Live Monitoring (routing MIDI input to the virtual synth engine for real-time audio playback). Recording MIDI into timeline buffers requires both **Track Arm = `true**` AND **Transport Engine State = `RECORDING**`.
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```text
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[ Track Armed ] + [ Transport STOPPED ] --> Live Monitoring ONLY (VU meter lights up, no recording)
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[ Track Armed ] + [ Transport RECORDING ] --> Live Monitoring + Event Buffer Write + Canvas Redraw
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```
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### Root Cause 2: Gate Condition in `handleMIDIMessage`
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In the client recording engine (`ClientMIDIRecorder`), incoming MIDI events trigger live synth audio, but note recording is gated behind a transport flag:
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```javascript
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handleMIDIMessage(event) {
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// BUG: If global transport is not in RECORD mode, execution stops here.
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// Synth gets triggered elsewhere, but recordedNotes array remains empty.
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if (!this.isRecording) return;
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const [status, pitch, velocity] = event.data;
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// ... logic to write to activeNotes and recordedNotes
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}
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```
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### Root Cause 3: Absence of Real-Time Canvas Redraw Loop
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For notes to render dynamically inside the MIDI Item clip as keys are pressed:
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* The UI Canvas must run a `requestAnimationFrame` render loop while `isRecording === true`.
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* The renderer must query the `activeNotes` Map (currently held keys) in addition to finalized `recordedNotes`.
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* If the UI only renders on static session updates (e.g., when clicking or stopping transport), live notes will not appear on screen during playback.
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### Root Cause 4: Track Target ID Unbound to Input Stream
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If multiple tracks exist, `ClientMIDIRecorder` must know which `track_id` is currently armed and matched to device `MIDIIN2 (SE49)`. If events arrive without a target track context, they cannot be routed into the target `MIDIItem.source_data.notes` array.
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---
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## 3. Technical Solutions & Code Adjustments
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### Step 1: Ensure Dual-Stage Recording State Verification
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Update the transport control logic so pressing **Record + Play** on the top toolbar initializes active record buffers on all armed tracks:
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```javascript
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// Transport Controller
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function startTransportRecording() {
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const armedTracks = session.tracks.filter(t => t.is_armed);
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if (armedTracks.length === 0) {
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console.warn("No tracks armed for recording.");
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startPlaybackOnly();
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return;
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}
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// Activate global transport record state
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transport.isRecording = true;
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transport.isPlaying = true;
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// Initialize temporary recording items on each armed track
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armedTracks.forEach(track => {
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const newRecordingItem = {
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id: `rec_item_${Date.now()}`,
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type: "MIDI_ITEM",
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start_bar: transport.currentBar,
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duration_bars: 0.1, // Expands dynamically during recording
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clip_start_offset_bars: 0.0,
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source_data: { total_buffer_bars: 8.0, notes: [] }
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};
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track.activeRecordingItem = newRecordingItem;
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midiRecorder.start(track.id, transport.currentBar);
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});
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// Start UI animation loop for live waveform/note preview
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requestAnimationFrame(renderLiveRecordingUI);
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}
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```
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### Step 2: Live MIDI Note Binding & Duration Expansion
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Update `ClientMIDIRecorder` to feed both the active buffer and the active recording clip:
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```javascript
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handleMIDIMessage(event) {
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const [status, pitch, velocity] = event.data;
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const command = status >> 4;
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// 1. Always trigger Live Audio Preview (VU Meter + Synth Node)
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this.triggerSynthPreview(pitch, velocity);
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// 2. Gate recording buffer write behind global transport record state
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if (!transport.isRecording || !this.targetTrack) return;
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const currentBeat = this.calculateLatencyCompensatedBeat();
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// Command 0x9: Note On
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if (command === 0x9 && velocity > 0) {
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const liveNote = {
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id: `note_${Date.now()}_${pitch}`,
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pitch: pitch,
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start_beat: currentBeat,
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duration_beats: 0.25, // Default initial length until Note Off
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velocity: velocity / 127.0
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};
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this.activeNotes.set(pitch, liveNote);
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this.targetTrack.activeRecordingItem.source_data.notes.push(liveNote);
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}
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// Command 0x8: Note Off
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else if (command === 0x8 || (command === 0x9 && velocity === 0)) {
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if (this.activeNotes.has(pitch)) {
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const note = this.activeNotes.get(pitch);
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note.duration_beats = Math.max(0.125, currentBeat - note.start_beat);
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this.activeNotes.delete(pitch);
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}
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}
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}
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```
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### Step 3: Real-Time UI Canvas Render Loop
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Add real-time item length expansion and live note drawing on the main canvas during recording:
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```javascript
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function renderLiveRecordingUI() {
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if (!transport.isRecording) return;
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const currentBar = transport.getCurrentBarPosition();
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session.tracks.forEach(track => {
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if (track.is_armed && track.activeRecordingItem) {
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const item = track.activeRecordingItem;
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// Expand item duration on timeline as playhead moves forward
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item.duration_bars = Math.max(0.5, currentBar - item.start_bar);
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// Draw item bounding box and active/completed MIDI note rectangles
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drawTimelineItem(trackCanvasCtx, item);
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}
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});
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requestAnimationFrame(renderLiveRecordingUI);
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}
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```
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---
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## 4. Checklist to Fix in Your Application
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* [ ] Check if clicking top toolbar **Record + Play** sets `transport.isRecording = true`.
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* [ ] Verify that Track 01 generates a temporary `activeRecordingItem` on record start.
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* [ ] Confirm `requestAnimationFrame` is re-rendering the canvas continuously while transport is moving.
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* [ ] Ensure incoming MIDI events on `MIDIIN2 (SE49)` push notes into Track 01's item note array rather than just playing the synth.
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