By A Mystery Man Writer
File:Intervalles wiki.PNG - Wikimedia Commons
Just Intonation, PDF, Interval (Music)
List of pitch intervals - Wikipedia
Interval vector - Wikipedia
Scale (Music), PDF, Scale (Music)
In music, when multiple notes are played together, why does the
Ninth - Wikipedia
Interval Ear Training
Bohlen-Pierce scale - Xenharmonic Wiki
If you play several musical notes at once, is the sound the sum of
Harmonic series (music) - Wikipedia