Play/Stop: Spacebar or click the transport button.
Swing: Drag the slider (0% = straight, 75% = lazy shuffle). Changes feel instantly.
Sequencer: Click steps to toggle notes. Each row is a track: Keys, Bass, Drums, Vocal Pads, Brass.
Chord Pads: Click to change the harmonic progression. Active chord highlights.
Mixer: Drag faders for volume. M (mute) / S (solo) buttons per track.
Sections: Switch between Intro, Verse, Pre-Chorus, Hook, Outro arrangements.
Export: MIDI (chord loops), JSON (arrangement data), WAV (rendered stems).
Presets: One-click genre starting points.
Persistence: Your arrangement saves automatically to localStorage.