Click REC to arm it, then Play. Pausing removes the pause from your take. At the song’s end, a 24-bit WAV is saved; Download WAV stays available if your browser blocks the automatic download. On iPhone, tap Save / Share WAV and choose Save to Files when available. Keep Safari open and the screen awake during a take; leaving Safari or locking the phone can interrupt audio. Click REC again to finish a take early. Recording includes your effects and output volume. The song keeps advancing during punch-in effects. Release a pad to return to the current song position.

Latch pads: click once on, again off. Turn Latch off for hold-to-play pads. Click Clear pads to release them all. Speed sets the song’s tempo and pitch. Half time, Spin back, Octave up, Stutter and Tape stop affect the sound while the song keeps its place.

Inspired by K.O. II, PO-33 and K.O.–Sidekick. Creative browser effects, not an exact hardware emulation.