Docs · Piano Roll

Piano roll guide

The piano roll is where you refine melody, chords, bass, or drums after generation. It is grid-snapped, velocity-aware, and works with a chord overlay when enabled.

Note editing

Click on the grid to add notes; drag to move. Drag the right edge of a note to change length. Snapping follows the current beat resolution. Delete notes with the keyboard or context actions when available.

Velocity editing

The strip below the grid shows per-note velocity. Drag bars up or down to change dynamics, or drag across multiple bars to shape phrases. Velocity affects playback level before the mix engine.

Chord detection overlay

When chord overlay is on, the editor can show harmonic context derived from chord-layer notes (or the current layer), bar by bar. Use it to align melodies and bass lines with the progression you intend. On the generator page, press D to toggle the overlay when a variation is loaded.

Undo and redo

Every structural edit is tracked in a local history for that layer. Use standard undo/redo shortcuts to step through changes without leaving the editor.

Fullscreen mode

Press F while the piano view is focused to expand the editor for more vertical space. Press Esc or the on-screen control to exit fullscreen.

Keyboard shortcuts

On Windows, use Ctrl where macOS uses Cmd. When focus is inside a text field, shortcuts are not intercepted.