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.
Interactive module
Harmonic cone
Each cone section is one exact whole-number multiple of the fundamental.
Starting octave
A3
Harmonic 110A3216.00 HzMatches equal temperamentRelative mass model · 1× fundamental
Hold a cone section to hear it. Hold more than one to combine harmonics.
1–8 play harmonics · O / P change octave
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