Interval Cent Trainer
Memorize cent values of JI ratios and EDO intervals. Adaptive learning with graduated feedback.
JI & EDOAdaptive LearningCustom PoolsReverse Mode
Chord Finder
Explore JI triads and seventh chords built from stacked thirds. Filter by complexity, map to any EDO.
Stacked ThirdsEDO MappingAudio Playback
Functional Harmony
Explore harmonic function classification across EDO systems. Interactive chord playback, MIDI export, and scale filtering.
12+ EDO SystemsChord PlaybackMIDI ExportScale Filtering
Adaptive Interval
Build JI intervals from prime ratios with adaptive difficulty progression.
Prime RatiosAdaptiveGraduated Feedback
Adaptive Chord
Compose JI chords by stacking intervals. Difficulty adapts to your performance.
Chord BuildingAdaptiveMultiple Voicings
Piano Roll Onslaught
Fast-paced piano roll challenges. Identify intervals and chords under time pressure.
TimedPiano RollScore Attack
EDO Explorer
Explore equal divisions of the octave and compare temperaments.
Compare EDOsInterval MappingError Analysis
Coming SoonLattice Visualizer
Visualize JI intervals and chords on a prime-indexed lattice.
2D/3D LatticeHarmonic SeriesCommas
Coming Soon