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.
Number tuner
♭
—Octave
—Octave
—Octave
♯Play or sing one note at a time
1 = C · 10 = A · O = octave
Center the needle to tune. 100 cents = one piano key.
Microphone audio stays on your device.
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