Twelve TheoryMath + Music Playground

Explore interactive music theory and music by numbers through Free Play, Math Mode, Chord Game, Harmonic Cone, Waveforms, Harmonic Polygons, Sheet Music, Musical Circles, and Ear Training.

Interactive module

Musical Circles

Compare chromatic distances, circles of fifths and fourths, major-key chords, and just-intonation relationships.

Appearance