Pick a track on the left (Kick, Snare, Hi-hats are already there) and tap squares in the Pattern tab to turn steps on/off. Every 4th square is marked — that's one beat. Hit ▶ Play (or press Space) to hear it loop.
Select a synth track (or add one with the + button, choose "synth"). Its Pattern tab shows a piano roll instead of steps — click a cell to place a note (row = pitch, column = timing), click a placed note to delete it. Pick a preset first in the Instrument tab (Bass, Reese Bass, Acid Bass, Pad, Lead, etc.) — every knob under it is yours to tweak.
The Mixer / FX tab has per-track volume, pan, EQ, distortion, chorus, delay, compressor and reverb send — plus master volume/compression/reverb at the bottom. Changes apply live while it's playing.
One pattern is one loop (like a verse or a chorus). Click + New pattern to start another — your tracks keep their instrument/mixer settings, but each pattern has its own beat/notes per track. Click a Pattern chip's name to edit it; click its 🔊/🔇 icon to add or drop it from the playback mix — every pattern with 🔊 lit plays together in a loop when you hit Play (great for layering, e.g. a drum pattern under a separate bassline pattern), even if they're different lengths.
Once your playback mix sounds right (set with the 🔊/🔇 icons above), tap + Add current mix in the song bar at the bottom — that whole layered stack appears as one chip in the arrangement strip. Repeat for every section (intro, verse, drop, outro...), building up a different layered mix for each one, in the order you want them to play. Switch the top-left toggle to Song mode and hit Play to hear the whole arrangement in sequence, each section playing its own overlaid patterns together.
🎤 Record Vocal captures your mic, then lets you snap it to a key/scale with an adjustable strength — 100% gives a hard, obvious "auto-tuned" character; lower settings are subtler. "Add as track" drops it in, triggered from the start of whichever pattern is playing.
Everything autosaves to this browser as you work. 💾 Save / Load lets you keep named snapshots or export/import a full .json project file (for backup or moving devices). ⬇ Export WAV renders the current pattern (or the whole song, in Song mode) to a real audio file you can download and share anywhere.