Pinch thumb + index to play. Left↔right = pitch, up↕down = brightness. Pinch fast for a louder attack (velocity). Open the other hand flat — or hold Space — for the sustain pedal. Two hands = two voices. Keys: ↑↓ octave, ←→ tone, f favourite. ● record writes a real .wav; latch holds the last note; 🥁 clicks on the bpm. Everything runs in this browser; no network calls after load.