42a3759d9db78857d50faa3ef1a930b47b5de579
12
Commits
| Author | SHA1 | Message | Date | |
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  adminandClaude Opus 5.5
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42a3759d9d |
Cut a sound into named clips, as a texture into frames (#357)
A sound could only be cut to one stretch, set on the asset itself. To
play two parts of one file, the file had to be imported twice. Now a
sound is always the whole file, and its clips are the stretches of it,
each with a name and a cut of its own.
- A clip is { id, name, props } on SoundAsset.clips. Its id shares the
generator with asset ids, so a sound field holds a sound or a clip,
as a texture field holds a texture or a frame.
- props are the cut: start, end, the fades and their curves, reverse.
Volume, loop, sound FX and bus stay on the sound for all its clips.
The cut rows left the sound's schema for CLIP_ROWS.
- findSound resolves either id. Play sound, the Sample of an
instrument, a Reverb impulse, song items, the scheduler and the test
sound of the Sound FX tab all go through it.
- Every sound field offers each sound followed by its clips, "Kick",
"Kick / Clip 1". A clip that is gone reads as "<id>?".
- The Sound tab has a strip under the ruler with the clips as bands.
A drag there makes a clip, a click picks one, beside the bands the
sound. Only the picked clip has handles. Reverse, fades and curves
in the header work on it and are greyed out without one.
- Whole file is gone from the header, as the user asked.
- Picking a clip is a selection of its own, like a frame. The
inspector shows its name, its cut rows and Delete clip. Delete
takes it away without asking, as with a frame. Ctrl+Z brings it
back.
- Copies get fresh clip ids: Duplicate, Embed a copy, a song
duplicated with its takes, and the copy a split or paste makes of
an embedded take. An item on a clip plays the same clip of its copy.
- A double-click on a song item playing a clip opens its sound with
the clip picked. The Sound row of an item on an embedded take
offers the take and its clips, which no list shows.
- A new take stays the whole sound. Clips are made by hand, as the
user decided.
- No migration in the code, as the user decided. The one project
with cut sounds was changed over by hand.
Deviation from the issue: deleting a used clip does not warn. A frame
does not warn either, and the issue had promised "like a frame".
Tests:
- Unit sound-clips (new): 11 green, 7 counter-checks each red
- Unit sounds, embedded: adjusted to clips, green
- e2e 34 (melektaus-atx): ALL PASSED, 90 checks (3 new, 12 rewritten)
- Counter-check in the browser: clips left out of the sound fields,
the picker check fails
- Gate (melektaus-atx): CHECK EXIT 0, 271 files, 4194 tests
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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adminandClaude Opus 5.5
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25c1d02b06 |
Keep the audio thread free of ended voices and too many vocoders (#356)
A song that had been played a few times in a long session stuttered at regular intervals until the page was reloaded. A quick run up the keys of a sampled instrument made every sound drop out for a second or two. Both came from work the audio thread should not have had. - Every worklet node of a voice listened on its port. Chrome never collects a port that is listened to, and through its listener not the voice either. Every node of the voice stayed on its bus and was worked on in every block. A way or stage on the worklet now closes its port once it ends or is stopped, and the processor closes its own side when it is told to stop. - A voice without echoes now leaves its bus as soon as its sound and what its stages hold back are through. Before, only a voice with echoes did. - At most 12 ways play through the pitch worklet at once. One more cuts the oldest in 10 ms, a note already let go before one still held. Each runs a phase vocoder, whose first block alone took 2.7 ms of the 2.67 ms a block has on stein2. - Play for the game ends everything the tabs play: the piece holding the transport and every key or preview (`stopPreviews`). - Closing a Sound, Sound FX, Instrument, Pattern or Song tab stops what it plays of that asset (`AssetTabEditor.closed`). - A preset in the Instrument tab plays nothing any more. With Audition on it is heard like any other change. - Test hooks: `__gm.instrument.play`, `__gm.sound.playing`, and `vocoders` in the stats of the sound library. Measured: - A copy of the project, its Song 2 played for 12 s and stopped, six times (Chrome on stein2, CDP WebAudio): before, 746 nodes were left after the first time and 4469 after the sixth, the load at rest grew from 0.01 to 0.06. After, 7 nodes are left every time (the master and one bus) and the load at rest stays at 0.01 to 0.02. - Pitch-player voices live in Chrome on melektaus-atx: 12 take 0.50 of the audio thread, 16 take 0.71, 24 take 0.99. 30 struck 40 ms apart held it at 0.99 from the first second on. Tests: - Unit sound-library: 110 green (3 new), 4 counter-probes each red - e2e 34 (melektaus-atx): ALL PASSED, 86 checks (3 new, 2 changed) - e2e counter-probe with game start and preset undone: their 3 checks red, and the old check of Play note in the game as well, which now counts on the preview being gone - e2e counter-probe with tab close undone: exactly its check red. A first form of it held a key and stayed green, since the keys let go of a held key by themselves once the tab shows no asset - Gate (melektaus-atx): 270 files, 4181 tests Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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8c0d1cfd3f |
Snap the routing graph of a song with the header's magnet (#350)
The routing of a song is the same graph editor as a sound FX, but its tab had no magnet, so its nodes could not be put on the grid. - The Song tab carries the magnet next to Routing. It is off at first and acts on the routing graph. - It is greyed out on the timeline, as Grid is greyed out in the routing. Switching the view only updates these two buttons, so a playing song is not handed its sequence again. - The check hooks give the magnet and the snapping of the routing. Tests: - e2e 65 (melektaus-atx): ALL PASSED, 52 checks (1 new) - Counter-check (magnet enabled on the timeline): exactly this check red - Gate (melektaus-atx): CHECK EXIT 0, 270 files, 4178 tests Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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23cb34f781 |
Keep a recorded take inside its song (#355)
A take used to land in the Assets panel as "Song – Take N", next to every other sound of the project. Now a song can keep a sound, a pattern or a sound FX to itself: an ordinary asset whose new field `owner` names the song. Everything that finds an asset by its id finds it, so playing, the tabs and the game need no change. Only the places that list assets leave it out. - `core/music/embedded.ts` holds the rules: which types can be embedded, `listedAssets`, the title "Song › Take 1", and the rows an embedded sound hides (Loop, Bus). - One user per embedded asset. `SetSongCommand` settles the song after every edit: a place naming an asset an earlier place claimed, or one of another song, gets a copy, and what nothing names any more goes in the same undo step. The outcome is worked out once, so a redo brings back the same copies. - A split, Ctrl+D and a paste get that for free. The clipboard keeps the embedded assets of the copied items, so a paste after a delete brings the take back. - Deleting a song deletes what it keeps. Duplicating it copies that and points the copy at the copies. A duplicate of an embedded asset is a project asset. - The item menu has Open, Make project asset and Embed a copy. - An embedded item carries a bullet in front of its name. The first pick was a diamond, which the gate's font test refused: the UI font has no glyph for it. - A take is "Take 1", 2, … numbered per song. With the song gone while it uploads, it becomes a project sound under a free name. - Left out of: the Assets panel, every asset picker, the sound FX menu of a track, the test sound of the Sound FX tab and the naming of new assets. Delete on an embedded asset only says where it lives. A ping lights up its song. - Loading drops an `owner` whose song is gone, the asset stays as a project asset. No migration: older projects have no owner. Tests: - Unit embedded (new): 13 green, 6 counter-checks each red - Unit take, song, song-edit, asset-fx, asset-ref, serialize and neighbours: 116 green - e2e 65 (melektaus-atx): ALL PASSED, 47 checks (1 new) - Counter-check e2e 65 (asset panel unfiltered): exactly that check red - Gate (melektaus-atx): CHECK EXIT 0, 269 files, 4167 tests Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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a295d233ed |
Give sounds, instruments, patterns and songs a sound FX (#352)
A sound FX could only be picked where something was played: on a Play
node, a track or an item of a song. A sound that should always sound
through the same effect needed that pick everywhere it was used. Now
the asset says it once, and every place that plays it follows.
- New row Sound FX on a sound, an instrument, a pattern and a song,
right before Bus. A sound goes through it on every voice, an
instrument on every note after its graph, a pattern on all its
notes together and a song on its output.
- The fx input of Play sound, Play note, Play pattern and Play song
and the Sound FX of a song item now read "From the asset" while
empty. None is a pick of its own, stored as `#none` like `#master`.
A pick replaces the FX of the asset, it does not come on top.
- A pattern item's Instrument reads "From the asset" instead of None.
The meaning is unchanged.
- A double-click on a sound item opens the sound, as one on a pattern
item opens the pattern.
- The tabs play through the FX of their asset. The Pattern and Song
tab put it on a bus of their own between the output and the bus of
the asset. The keys of the Pattern tab play there too.
- Notes of a pattern or song go through the FX of their instrument.
Its chain is loaded with the other needs of the sequence.
Decided without asking:
- Old items and Play nodes with an empty fx now mean "From the
asset". No asset has an FX yet, so nothing sounds different.
- The label is "From the asset" as on Loop and Bus, not "From asset".
- A sound used as a Sample, as the impulse of a Reverb or as the test
sound of the Sound FX tab plays without its own FX.
Findings:
- In e2e, `__gm.inspectorField('Sound FX')` and `('Instrument')` find
the group of the Assets panel first. The check asks for the last
match.
Tests:
- Unit asset-fx (new): 8 green. Six counter-checks each turned red.
- Field lists of sound, pattern and song: Sound FX added.
- e2e 65 (melektaus-atx): ALL PASSED, 46 checks (3 new). Counter-check
without the FX bus of the tab: that check red.
- Gate (melektaus-atx): CHECK EXIT 0, 268 files, 4142 tests.
- Not checked: how it sounds, the Sound, Instrument and Pattern tab
in the browser.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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adminandClaude Opus 5.5
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daeffe0f9d |
Route the tracks of a song through a graph (#350)
Every track of a song went straight into its output. Now the Song tab has a second view, Routing: a graph with a node per track and one Output, the links between them sends. A track can go into other tracks, into several at once, and a link has its own volume and the point of the track it taps. - The song asset has a graph like an instrument (SongTrack, SongOutput). heldSongGraph keeps it in step with the tracks on load and in SetSongCommand: a node per track named after it, one output, a new track and every track of an old song linked to the output. Links of gone tracks, doubled links and links closing a loop are dropped. - A link carries an optional send (volume in dB, tap). The inspector shows Volume and Mode for a picked link of a song: Post volume (Post pan), Pre volume (Post FX), Pre volume (Pre FX). SetSendCommand. - NodeDef has two new flags. `fixed` nodes are never added or deleted by hand. Links between `acyclic` nodes may not close a loop, checked in canConnect, dropTargetPort and ConnectCommand. - songBuses gives each track its sends instead of one `into`, and a bus `song:<song>:<track>:#items` for its own items. That bus is what solo closes on a track that only passes a soloed one on. - Mute and solo now act on the sends (trackGates). A muted track passes nothing on, on any tap. A soloed track is heard with what goes into it, through the tracks it goes through, their own items silent. Only sends on a way through a soloed track stay open, so a track going into it and into the output is heard through it only. - SoundLibrary: a bus has either `into` or sends. Each send is tap, delay, level, target. busLatency takes the latest way (arrivalOf), and each send is held back so all ways of a track arrive together (sendDelays). Taps are wired again whenever a chain comes or goes. - The Song tab has Timeline and Routing in its header. The routing uses GraphCanvas with an empty palette. A track linked nowhere shows "Goes nowhere". Delete takes links, never a track node. - Game playings route the same way, the output being the master of the playing. Decided without asking: a send ranges -60 to +12 dB like a track, default 0 dB Post. Mute closes the sends, the track's own level stays. Found on the way: the inspector built the Mode row with the send as it was when the rows were made. Setting Volume and then Mode wrote the old volume back. Both rows now read the current send when they change. Tests: - Unit song-routing (new): 13 green. Sound library: 4 new, 94 green. 11 counter-probes (loop on load, canConnect, solo, solo past the soloed track, mute, preFx latency, graph sync, delete guard, delays, taps, glide), each red. - Existing tests adjusted to the new bus names and send shape: song, bus-fx, song-play, graph registry, edge description. - e2e 65 on melektaus-atx: ALL PASSED, 43 checks (5 new). The first run caught the inspector bug. Counter-probe with the old closure: 2 FAILED. - Gate on melektaus-atx: typecheck, lint, format clean, 2 tests red (registry rule, edge shape), fixed and rerun locally: 56 green. - Not rerun after the per-send solo fix: e2e 65 and the gate. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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3a52f2290f |
Mix sounds through buses and a master (#325)
Until now every sound went straight to the speakers. There was no point where all of them came together, so nothing could turn the music down against the effects, and a compressor or a shared echo over everything had nowhere to sit. The bus technique of #346 was there already, only the end of the chain was missing. - Bus asset (Audio): Volume, Sound FX and Into. Into is empty for the master and never offers the bus itself nor a bus that already goes into it. The list is worked out when the menu opens, so a change made meanwhile counts. A loop that is in a project anyway sends the buses on it into the master. - The master is no asset. Its volume and sound FX are two new rows under Master in Project settings, one undo step each. A project written before has 1 and none, which is how it sounded. - Sound, instrument, pattern and song have a row Bus, empty for the master. Play sound, Play note, Play pattern and Play song have an input bus: From the asset, Master or a bus. Inside a song or a pattern only the bus of the song or pattern counts. - Set bus volume (bus, volume, time, easing) and Bus volume. An empty bus is the master. The volume set holds for the whole run, across scenes, over that of the asset. GameRun resets it at start and end. Set sound FX parameters without a voice now reaches the sound FX of the bus picked in its new bus input. - SoundLibrary: the master is the bus "mix", each bus "mix:<id>". Every bus, the playing masters of #346 included, ends there, and only the master is heard. setMix sets them up once a context exists, so an editor nobody listened to opens no audio device. The same mix again changes nothing, which lets the editor hand it over on every change of the project. - The tabs play as the game does: Sound, Sound FX, Instrument, Pattern and Song tab through the bus of their asset and the master. - Pause game does nothing to the buses (the user's answer 4b). A game that wants quiet in its pause menu sets a bus volume itself. - Streaming long music files is #349, split off as asked. Finding on the way: the Into menu first worked from a list made when the inspector row was built. After another bus was sent into the open one, e2e 34 saw it still offered. It is now asked on open. The SoundLibrary tests expected voices to end at the destination. They now end in the master, which adds its input, level and pan to every wiring and two gains to every list. Those expectations are updated, nothing else in them changed. Tests: - Unit buses (new): 15 green. Ten counter-checks, each red on its own: loop check, bus picked, reset at run start, bus of Set sound FX parameters, master volume in the settings, and in SoundLibrary default into the master, voices into the master, run volume over the mix, no context before a play, a playing on its bus. - Unit sound-library: 90 green (5 new). Node catalog: 416 green (9 new cases). - e2e 34 (melektaus-atx): ALL PASSED, 75 checks (3 new). The voice of the Sound tab was heard on mix:<bus>, that bus into the other, that one at 0.5 into the master. Master volume 0.6 via the dialog, undo back to 1. - Gate (melektaus-atx): CHECK EXIT 0, 262 files, 4072 tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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d505f6ed27 |
Show what the song plays around a pattern as ghost notes (#339)
A bass line is written against the chords it goes with. Until now the piano roll showed only the pattern itself, so writing a part to fit the rest of a song meant switching between the Pattern and the Song tab. - A double-click on a pattern item remembers song, item and the round clicked into for that pattern. The place lives in the session, not in the project, and goes by the item's id, so moving the item moves the ghost notes along. - Opened from the Assets panel, the pattern shows the item of the last double-click. Without one, a pattern that lies in exactly one item of all the songs shows that item's first round. - Ghost notes are the pattern items of the other tracks all along the song, and on the own track the items before and after and the other rounds of the item. The round edited itself does not count. Sound items have no notes. - A ghost note sits on the row it sounds with: its own transpose, less the transpose of the item the pattern was opened from. - The roll draws them grey, without an edge, under the notes. Resting on one names its track and its pattern. - The header has a Ghosts switch, on by default, and names where they come from, e.g. "Tune · Bass · bar 5". - The time axis pans back to the start of the song, with bar and grid lines before the pattern. Fit still frames only the pattern. - A click or a paste outside the pattern no longer lands. Before, only the time left of bar 1 was closed, notes could still be drawn past the end, where they are kept but never played. - The rounds of a pattern item are now worked out in one place, itemNotes() in song.ts, which songSequence() and the ghost notes share. Tests: - Unit ghosts (new): 5 green. Counter-check with the round edited not left out and the own transpose not taken off: 2 red. - Unit piano-roll: 1 new (pan back to the song, lines before bar 1). Counter-check without the song's start: red. - e2e 65 (melektaus-atx): ALL PASSED - 38 checks (3 new). The first run was red on the tooltip check: the ghost note it rested on lay a fifth up, outside the rows Fit frames. The test now uses a tone. - e2e 64 (melektaus-atx): ALL PASSED - 30 checks. - Gate (melektaus-atx): CHECK EXIT 0, 260 files, 4027 tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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b519cd192f |
Send a track, a pattern item or a whole song through a sound FX (#346)
A sound FX could only be put on a single sound. Now a track, a pattern item, a Play pattern and a Play song send everything they play through one chain of it, as an insert in a DAW. A Play note gets one of its own. - Track: an FX box in the head next to M and S opens a menu of the project's sound FX, and the track's inspector has the row too. Order: items, track FX, volume, pan. - Pattern item: Sound FX in its inspector. Its notes play on a bus of their own into the track's bus. - Play pattern and Play song take fx and fx params. The chain sits on the master of the playing, after the tracks and before the level and the fades. Set sound FX parameters reaches it by the playback. - Play note takes fx and fx params next to the instrument's params. The FX parameters go by "fx:" so the two sets stay apart. Set sound FX parameters on a note changes a name both have in both. - A Pitch on a bus is a new PitchShifter: the phase vocoder of the PitchPlayer, fed while it plays. It cannot look ahead and is exactly one frame late at every pitch, 2048 samples. - That latency is made up. The other way of a Mix is held back by a delay of the same length. Every note and clip starts as much earlier as the buses it passes are late. The scheduler plans that much further ahead, and the first note waits that much after Play. - The Song tab waits for the chains before it plays and lets its buses go a moment after Stop. A playing in a game lets them go after its echoes and what the shifters still hold. - songBuses moved to its own file. Kept in song.ts it pulled the FX compiler into the node registry through an import cycle. Decisions of the user: one chain for the whole (1a), FX everywhere asked for (2a), Set sound FX parameters on playbacks (3a), and a pitch shifter of its own with exact latency compensation for a Pitch on a bus. Tests: - Unit pitch-shifter (new): 11 green. At 0 semitones the output is the input 2048 samples later, off by at most 1.2e-7. - Unit sound-library: 84 green, 8 new. Counter-checks (no early start, no Mix delay, chain made every time, tune misses the master) each turned their test red. - Unit bus-fx (new): 6 green, 4 counter-checks red. Scheduler ahead: 1 new, its counter-check red. - e2e 65 (melektaus-atx): ALL PASSED, 35 checks, 4 new, first run. Chrome at 44.1 kHz: the bus was 0.046440 s late, the note started exactly that much early. Offline the shifter moved 1 kHz to 2000 Hz and passed a click 2048 samples later. - Gate (melektaus-atx): CHECK EXIT 0, 259 files, 4021 tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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2fdf97f7de |
Record a take from the microphone in the Song tab (#342)
A song could only be filled with sounds that were made somewhere else. Record plays the song from the cursor and takes the input meanwhile, so a part played along lands on the bar it was played to. - An audio worklet takes the input's samples on the clock the song plays on. Each run carries the frame it was taken at, so the take is cut where the song was heard to start. The output's and the input's latency are taken off, as far as the browser reports them. - The take goes up as mono 16-bit WAV. Sound, a new track "Recording" under the track clicked last and the item at the cursor are one undo step. The sound is named "Song – Take 1", 2, 3 and so on. - While recording the take grows red with its waveform on its track, and a meter beside the input dropdown shows the level. The lanes take no edits then, only a middle-drag pans. - The loop is not used while recording. The song plays once through and on past its end until Stop, Play or Space keep the take. Esc throws it away and nothing goes up. - Echo cancelling, noise suppression and auto gain are off, nothing is played back. The input picked is kept in localStorage. - A take stops by itself at the size a sound may have. A failed upload offers Retry, Download WAV and Discard. - The API takes sounds up to 256 MB and bodies of the same size. nginx and PHP were raised to match outside the repo (body 256m, upload and post 256M, memory_limit 512M). - The pure rules (cut, cap, WAV header, name, track) live in core/music/take.ts. The scheduler tells where it started on the audio clock. - The e2e browser gets chromium's fake microphone and skips the permission prompt. Each run leaves its take in the sound store. Found on the way: - The header was too full with the new widgets and cut the track and item count on the right. Input dropdown and meter are narrower now. Tests: - Unit take.test.ts: 7 new, svg-icons adjusted to 8 toolbar icons - e2e 65 (melektaus-atx): ALL PASSED – 31 checks (+4) - Gate (melektaus-atx): CHECK EXIT 0, 252 files, 3923 tests - Probe on stein2: a 3 s take of the test tone, peak 32767, 285100 bytes, waveform seen in the screenshot Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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f97961c8ff |
Play and stop a song from a behavior in the game #336
A song could only be heard in its tab. Now a game plays it through Play song and ends it through Stop song, with its tracks as they are set. A playing pattern or song also no longer undoes the pause of the toolbar. - Play song plays from the start of the song and then round the loop of its ruler, so an intro is heard once. Without loop it plays once to its end. Inputs are song, volume, fade in, loop (on by default) and detached (off by default). It gives out playback. - Stop song stops one song, every song for none, or one playback by its number, over its fade out. Stop sound with no sound named stops songs too. Stop pattern with no pattern named stops only patterns. - Songs play side by side, as patterns do. They are owned like a sound, so leaving the scene ends one unless it is detached. Pause game and the time scale leave the music alone. - Each playing is heard through a master of its own, silent until its first note. The fades move it, and a song's tracks sit inside it on buses of their own. They go once the playing and its voices have. - Notes and clips are struck the same way in the editor and the game (strikeNote, playClip). What a sequence needs comes from one place (core/music/needs). Findings: - Reading the audio clock resumed a suspended context. A playing pattern read it every 25 ms and so undid the toolbar's pause. The library now leaves a context alone while the toolbar holds it. - A pattern played once to its end asked the list of playings about its voices, and that list asked the pattern again. Once its last voice was gone this ran until the stack overflowed. The scheduler of a playing now asks only after voices. - e2e 64 reads the playings through __gm.sound.playbacks() now. Tests: - song-play.test.ts (new): 8 tests, node catalog +8 cases - sound-library.test.ts: 66 tests, 4 new - e2e 64 (melektaus-atx): 23 of 23 checks passed - e2e 65 (melektaus-atx): ALL PASSED, 22 checks (+4) - Gate (melektaus-atx): CHECK EXIT 0, 251 files, 3903 tests - Counter-checks: the old way of asking after voices, a clock read that wakes a held context, and a start after a fade out began each fail 1 test Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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8f9c250eb6 |
Lay patterns and sounds out on tracks and play them as a song #334
Patterns could only be heard one at a time, in their own tab or from a behavior. A song lays patterns and sounds out on tracks along one time axis and plays them through the scheduler of #332, the third piece of the music tools of #330. - New asset type song under the heading Songs, with four empty tracks, 120 BPM in 4/4 and a grid of a bar. Tempo, meter and grid are rows in the inspector. Tracks, items and the loop are the asset's data, held to their rules on load and in every command. - A track has a name, volume, pan, mute and solo. Each is heard on a bus of its own, so a change reaches what is sounding at once. - A pattern item repeats its pattern for as long as it is, with a transpose and another instrument if wanted. A sound item plays its sound as a clip at its own speed, round and round, through a sound FX if wanted. Both have a volume on top of their track's. - Cut back at the left end or split, an item starts as far into what it plays as the cut is: ticks into a pattern, seconds into a sound. - The tab shows the heads with M, S, volume and pan, the ruler of the Pattern tab and the items, a pattern with its notes, a sound with its waveform, a missing asset red. Patterns and sounds are dragged in from the Assets panel. Body, right and left end move, lengthen and cut back, Alt leaves the grid. Ctrl+C/V/D/A, Ctrl+E splits where playing starts, Delete, arrows. A double-click opens a pattern item in its tab. - What is picked is a new selection of its own, so the inspector shows the item or the track, with a button to delete it. - The scheduler plans clips beside notes. Where the playhead starts or jumps back inside a clip, it is taken up that far into its sound. A clip fades out at the end of its item or of the loop. - The editor plays one piece at a time: a pattern started stops the song and the other way round. - The rules are pure functions in core/music/song, editor/song/ songView and songEdit. Findings: - The suites of |