Changed itemEndBeat <= windowStartBeat → < and
noteAbsEnd <= windowStartBeat → < so abutting items
(Item 1 ends at bar 1, Item 2 starts at bar 1) show
ghost notes from the adjacent item.
handleEditMidiInTab now sets currentTime relative to item start:
currentTime = Math.max(0, mainTimelineCurrentTime - midiItem.startTime)
so playhead reflects the main timeline position instead of bar 0.
handleSwitchMidiItem now computes new currentTime from the delta
between old and new renderBeatOffset, keeping the playhead at
the same session-absolute time instead of resetting to bar 0.
When activePlayTrackIds was null (default: all play), clicking a track
created an empty Set and deleted nothing. Now initializes with all
track IDs, so click toggles the clicked track off/on correctly.
- Remove dashed border from ghost notes (fill-only at 25% opacity)
- Track column: replaced div overlay with natural flex child; use
<button> elements with border-l-2 indicator; removed pointer-events
- Ghost playback: skip layers with no instrument assigned (silent)
instead of playing with default piano
- Track column: centered 12px buttons, purple active / yellow highlight
- Ghost playback: ghostLayers synced to st.ghostPlayLayers via useEffect;
schedulePianoRollMidi plays ghost notes from active tracks
- Per-track MIDI channels: each track gets a unique channel based on
its index, enabling separate instruments per track
renderBeatOffset was in bars but used as beat offset in rendering.
Multiplying by timeSigNum=4 converts to beats so items appear at
correct session-absolute positions.
- handleSwitchMidiItem no longer saves/sets previous item as ghost
- Removed ghostTrackFilter/filteredGhostLayers
- Track column shows clickable track names that toggle play state
- activePlayTrackIds Set controls which tracks' MIDI are playable
- Context menu flips upward near viewport bottom edge
- Track column (120px) left of keybed: checkboxes per track to
filter ghost notes; active track highlighted
- Session mode: canvas extends to full session duration
- Filtered ghost layers via ghostTrackFilter state (Set of track IDs)
- Fixed bar label seek in session mode (was using wrong offset)
- MIDI ghost notes: all non-selected items rendered at 25% opacity
- Dropdown at tab title: switch active edit target across all tracks
- Session Sync mode (default): viewport aligned to session bars
- Isolated mode toggle: bar 0, no ghost notes
- Ghost toggle: show/hide ghost layer (only in session mode)
- Auto-scroll to session position in session sync mode
- Bar labels show absolute session bar numbers
Khi load SF2, preset lookup của program_change dùng search order
(lần lượt qua các SF đã load). Track 1 load SF2→SF2 presets override
SF1 trên tất cả channel, track 2 chọn nhầm preset của SF2.
Fix: program_select(synth, ch, sfHandle, bank, prog) chỉ định rõ
SoundFont ID, không phụ thuộc search order.
Cùng MIDI pitch 60, track 1→ch0, track 2→ch1 cùng key '0:60'
→ single value bị overwrite, stopNote chỉ stop 1 channel.
Fix: _activeNotes[key] = [ch1, ch2, ...], stopNote iterate all.
Line 378: 'if (channel===undefined) channel=ch' gán channel = FluidSynth
channel (2), sau đó _activeNotes key dùng channel (2) thay vì MIDI
channel (0). stopNote lookup bằng 0 → key mismatch.
Fix: _origChannel = channel ngay đầu hàm, dùng _origChannel cho key.
1. precompiled: find(t=>isArmed) → filter(t=>isArmed) loop all tracks
2. soundfontPlayer: _activeNotes[ch:pitch] = mappedCh lưu khi noteOn
3. stopNote lookup mappedCh từ _activeNotes thay vì dùng MIDI ch 0
→ Fix: đổi SF track → channel mới → noteOff vẫn tìm đúng voice
_engineChMap: key=sfId:bank:prog → allocated MIDI channel.
Mỗi track ARM riêng biệt có engKey khác nhau → allocated channel
riêng (0-8 round-robin). _playNoteFluid lookup channel từ map
thay vì dùng MIDI channel gốc (luôn 0).
Trước đây chỉ schedule noteOff khi delay > 0 (notes scheduled).
Virtual piano keyboard play note immediate (delay===0) với duration=500ms
nhưng không có noteOff → âm thanh play mãi không tắt.
Fix: schedule noteOff khi 0 < durationMs < 60000, không phụ thuộc delay.
app.precompiled.js được build từ app.jsx cũ (10:54), thiếu:
- SonicSF.stopNote() trong MIDI note-off handler → note không tắt
- duration 500ms (quá ngắn, nên 60000ms = hold)
Patch thủ công bằng Python replace trên minified code.
- Dùng _fluid_synth_all_sounds_off thay vì CC120
- Log return value của _fluid_synth_noteoff (0=OK, -1=fail)
- Log ch+pitch trong stopNote
- Sửa printErr filter (bỏ check 'stderr')
- synth.gain=2.0 (thay vì 0.5 + set_gain 1.0) để tăng volume
- Pre-zero HEAPF32 buffer trước khi gọi write_float
- Log peak, avg, và value từ _fluid_synth_get_gain để debug
- _fluid_synth_set_gain(1.0) sau khi tạo synth (đảm bảo gain > 0)
- Log noteOn(ch, pitch, vel) mỗi lần play
- Log peak frame đầu tiên khi render > 0.001
- Error log trong catch pushFrame
- Sửa _playNoteFluid: dùng usedBank để xác định ch khi undefined
process() gán Float32Array (cả frame 512 samples) vào out[0][i]
thay vì sample riêng lẻ → NaN → silence.
Fix: track fi (frame index) + si (sample index), đọc qL[fi][si].
- Gọi _fluid_synth_error để lấy error message từ C engine
- Fallback từ .sf3 → .sf2 nếu sfload thất bại
- TOTAL_MEMORY=256MB cho SoundFont 11MB
- unlink file cũ trước writeFile tránh MEMFS conflict
- Log MEMFS stat để debug
Module script (type=module) có document.currentScript === null,
nên libfluidsynth không thể tự locate .wasm file. Fix: pass
locateFile() trả về URL .wasm tương ứng với URL .js đã load.
fluidsynthLoader.js: expose __FluidSynthLocateWasm() trả về
FLUIDSYNTH_JS_URL.replace('.js', '.wasm'). Dùng polling
setInterval thay vì resolve callback cho đáng tin cậy hơn.
soundfontPlayer.js: pass locateFile factory khi gọi factory.
Root cause: SpessaSynth's CC123 (All Notes Off) calls stopAllNotes(false)
which enters the SoundFont release envelope. Tremolo Strings (GM#44) and
similar sustained instruments have 2-5s release tails, causing notes to
continue playing after MIDI key release.
Fix: Replace CC 123 with CC 120 (All Sound Off) in stopNote() and
stopAll(). CC 120 calls stopAllNotes(true) which sets voice.isActive=false
instantly, bypassing the release envelope entirely.
Removed redundant noteOff(ch,pitch,0) and resetAllControllers(CC121)
which unnecessarily reset volume/pan/expression on the channel.
3dtours