Create and edit
- Editable UTF-8 JSON .gpiano projects
- 21-key, 88-key, and used-range piano-roll views
- Marquee selection, multi-select, copy, move, zoom, undo, and redo
- Beat length, key-hold duration, and snap grid
From the first note to in-game playback, every feature is designed for clarity, control, and safety.
Choose the Windows build that fits your setup.