Keys: Q–I play tracks, A–K play the selected track as a scale, Rec writes them in while playing; press ? for all shortcuts. Your name: type it and press the button: it becomes a beat (same name, same beat; the name stays on your device). Sound: click a track's sound name, then ↑ ↓ swaps it live inside that track's folder. Patterns: click 1–8 to switch (while playing it changes at the next bar), Shift-click saves the current pattern into that slot. Notes / velocity: drag the lane under the waveform; scroll over a lit step for its note, Shift-scroll for its velocity. Knobs: drag up/down, scroll, double-click to reset.
TUNE moves the whole track; the lane moves single steps. Velocity sets loudness and how far the filter opens on each hit. Delay is a tempo-synced 3/16 ping-pong; reverb is one shared room.