Visualize theory, hear results
Play notes or auto‑stack intervals with one click. Highlight by key and mode to sketch ideas fast.
A Desktop Piano & Time‑Warping Media Player
Theory-aware keyboard and audio player for composition and transcription.
The precision tools you need in a beautiful interface.
Designed for flow
Loop, slow down, focus
Load a track, set A/B markers, and time‑warp playback to transcribe tricky passages without losing pitch.
Fast, native, distraction‑free
Notarized universal binary for Apple Silicon and Intel. Thoughtful shortcuts and a clean dark UI.
Watch the demo
Short overview of Diatonic features and workflow.
Support development
Diatonic is free. If it helps you, you can fuel future updates in one click.
No paywalls, no ads — just optional support. Thank you.
Questions or feedback
Send a note here, or open an issue on GitHub if you prefer.