Bring something in
Import or drop audio files. WAV, MP3 and other formats work when your browser can decode them. Each imported file gets a track. Tap a source’s + to place another copy at the playhead on the selected track. Record creates a new track after you stop.
Arrange, then shape
Tap the ruler or an empty lane to place the playhead. Drag clips horizontally to move them, or vertically to another track. Pull the left or right edge to trim. Select a clip for exact timing, source offset, gain and fades. Split divides it at the playhead. Duplicate places a copy directly after it. Overlapping clips on a track are mixed, not replaced.
Mix it
Select a track’s label for pan and volume. M mutes a track; solo buttons isolate one or more tracks. Audition on a clip solos its track and starts there; turn off solo to hear the whole mix again. Track and master changes work during playback. Other edits pause playback. Grid BPM controls snapping only; it does not change pitch or stretch audio.
Keep it
Export a stereo or mono 16/24-bit WAV at 44.1/48 kHz. Full arrangement exports include leading gaps; selected-clip range exports all audible tracks within that time range. Save a .soundfold project to keep editable tracks and full source audio. Recovery is optional and local.
Practical limits
Up to 12 tracks, 64 clips, 32 sources, a 10-minute timeline and 192 MB of decoded source audio. An individual import must be 64 MB or smaller. Files decode into memory, so start smaller on phones. Recording requires browser permission and a supported microphone context, usually HTTPS or localhost. No network requests or external libraries are used.
SpacePlay / pauseHomeReturn to startS / DSplit / duplicate selected clipDeleteRemove selected clipN / LToggle snap / loopMAdd or edit markers+ / − / FZoom in / out / fitCtrl/Cmd ZUndo; add Shift to redoCtrl/Cmd SSave editable projectShift + dragMove without beat snapping