Choose MIDI file to visualize
Choose audio file to hear
Audio start delay (s)
(applies on next playthrough)
Press P to play/stop; press U to toggle this UI overlay
Choose visualizer config file to load
(reload MIDI and audio afterwards)
Enable scrollbars

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⚠ Detailed grid config GUI is work-in-progress.
Here are some example config files you can check out in the meantime:
Default config (12edo), "Alouette Isle (12edo)",
"Coffee at Button's (12edo), "Fifteen Frolicsome Figures (15edo)"

Edit current configuration