Monday, March 7, 2016

Tetrachords


A tetrachord (TC) is four successive tones separated by three intervals.

The Names of Tetrachords


Tetrachords get described by the intervals between the tones.

Major: M2, M2, m2 →  221
Minor: M2, m2, M2 →  212
Upper Minor: m2, M2, M2 →  122
Whole Tone: M2, M2, M2 →  222
Harmonic: m2, m3, m2 →  131
Locrian: m2, M2, m2 →  121