Twelve TheoryMath + Music Playground

Explore interactive music theory and music by numbers through Free Play, Math Mode, Chord Game, Circle Counting, the Triad Chart, Chord Progressions, Church Modes, the Counterpoint Game, WTC, Dodecachordon, Harmonic Cone, the Harmonics Quiz, Frequency Chart, Harmonic Wave, Waveforms, Harmonic Polygons, Tuning String, Sheet Music, Musical Circles, and Ear Training.