Un la à 440hz, puis un la élevé d'un comma à 446 hz, puis les deux ensemble. Fait avec CSound.An A at 440 hz, then an A + one comma at 446hz, then both together. Made with CSound.
Modulations from C major to C sharp major in natural temperatures (just intonation) end at almost the same pitch although there should be a half-tone difference.
Sum and difference tones of A220 and unison, just perfect fifth, and octave. Note that this is not produced through ring modulation of two notes, but is four separate notes.