Combination Tone Calculator
Sum and difference tones for two or three pitches
MIDI numbers or ASPN note names, separated by commas or spaces:
60, 64, 67 or C4 E4 G4 or C4, Eb4, G#4.
Range A0–C8 (MIDI 21–108).
Source pitches
Combination tones within A0–C8
Pitch-class collection (hexadecimal)
Source pitch only
First order only
Second order only
Shared by two or more
Include in collection
Twelve-tone equal temperament, A4 = 440 Hz. Combination tones are computed from
fundamental frequencies; their audibility in practice depends on register, intensity, and timbre.
Pitch classes are taken from the nearest equal-tempered semitone.