Studio (DAW)

Each project track opens in a multitrack editor at /studio/projects/:project/track/:track. The project owner and accepted collaborators work on the same stems, and changes show up for everyone in realtime when a realtime driver is set.

What it does

• Stems: upload audio files as stems, move and trim clips, set fades, volume, pan, mute and solo. A preview mix is rendered in the browser and saved as MP3.
• Effects per stem: EQ, reverb, delay, compressor and low-pass filter. They are saved with the stem.
• Instruments: a drum machine (kick, snare, clap, hats, tom, rim, shaker) and a piano roll with keys, pluck, pad, bass and lead sounds. Both are synthesized in the browser and saved as ordinary stems. The pattern is kept, so it can be edited later.
• Recording from the microphone into a new stem.
• Beat grid with BPM and meter, for snapping and for instruments.
• Version history: earlier versions of the track can be restored. How long they are kept is the plan's history_days, and studio:prune-history deletes older ones.
• Side panels: AI tools, history and sounds. On desktop they dock beside the editor, one at a time; on smaller screens they open as a sheet.
• Region messages: select part of the timeline and start a conversation about it. Opening the message highlights the region for whoever reads it.

Limits from the plan

Feature	Effect
max_projects	Projects someone can create
max_collaborators	Collaborators per project
max_stem_size	Largest stem upload
max_storage	Space for their own sounds
history_days	How long versions are kept

In code

• src/components/Studio/StemEditor.vue wraps @dawcore/components (pinned to 0.0.37). The editor is created in onMounted, so it is SSR safe.
• Clip fades and the exported mix are handled by StemEditor itself with an OfflineAudioContext, because dawcore does not apply them.
• Effects and instruments are defined in src/utils/studio/effects.ts and src/utils/studio/instruments.ts.
• Side panels wrap their content in src/components/Studio/StudioSheet.vue.
• On the API, stems are ProjectTrackStem rows. Their meta JSON holds the editor state, such as clips. Versions are in project_track_versions.