Two or more notes can sound simultaneously, by same or different instruments or voices {chord, music}. Related chords share tone.
Chords can have four tones {tetrachord}.
Tetrachord can divide intervals three ways {genera}: diatonic, chromatic, and enharmonic.
Intervals can have two whole tones and one halftone {diatonic interval}, such as C, D, E, and F.
Intervals can have one minor third and two halftones {chromatic interval}, such as C, D#, E, and F.
Intervals can have one major third and two quartertones {enharmonic interval}, such as C, E, E/F, and F.
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0225