JI Composition Trainer
Master just intonation through interactive exercises
Adaptive Interval
Build JI intervals from prime ratios. Adaptive difficulty unlocks new intervals as you master them.
Adaptive Chord
Build JI chords note by note. Master triads, seventh chords, and their inversions.
Piano Roll Onslaught
Place notes on a vertical piano roll to match spawning targets. Navigate with JI ratios in any EDO.
Keyboard required. Use number keys (1-0) for prime ratios, letter keys (Q-P) for reciprocals.