Harmonic Scale

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Harmonic series on C, partials 1-5 numbered About this sound Play .
Harmonic series on G, partials 1-5 numbered About this sound Play .

The Harmonic Scale is a "super-Just" musical scale allowing extended just intonation, beyond 5-limit to the 19th harmonic (About this sound Play ), and free modulation through the use of synthesizers. Transpositions and tuning tables are controlled by the left hand on the appropriate note on a one-octave keyboard.[1]

For example, if the harmonic scale is tuned to a fundamental of C then harmonics 16-32 are as follows:

Notation Harmonics[2] Cents
C C C About this sound 16  0
C C17 D About this sound 17  104.96
D D D About this sound 18  203.91
E E19 E About this sound 19  297.51
E E E About this sound 20  386.31
F F7+ FHalf down arrow.png About this sound 21  470.78
F F FCheck down arrow.png About this sound 22  551.32
G G G About this sound 24  701.96
A A13 AHalf up arrow.png About this sound 26  840.53
A A+ A About this sound 27  905.87
B B7 BHalf down arrow.png About this sound 28  968.83
B B B About this sound 30  1088.27
C' C' C' About this sound 32  1200

Some harmonics are not included:[1] 23, 25, 29, & 31. The 21st is a natural seventh above G, but not a great interval above C and the 27th is a just fifth above D. About this sound Play diatonic scale 

Harmonic Scales chromatic on C and G. About this sound Play chromatic scale on C 

It was invented by Wendy Carlos and used on three pieces on her album Beauty in the Beast (1986); Just Imaginings, That's Just It, and Yusae-Aisae. Versions of the scale have also been used by Ezra Sims and Frans Richter Herf.[3]

Number of notes[edit]

Though described by Carlos as containing, "144 [=122] distinct pitches to the octave,"[4] the twelve scales include 78 (=12(12+1)2) notes per octave.

Technically there should then be duplicates and thus 57 (=78-21) pitches (21=6(6+1)2). For example, a perfect fifth above G (D) is the major tone above C.


  1. ^ a b Milano, Dominic (November 1986). "A Many-Colored Jungle of Exotic Tunings", Keyboard.
  2. ^ Benson, Dave (2007). Music: A Mathematical Offering, p.212. ISBN 9780521853873.
  3. ^ Sims, Ezra (1987), "Observations on Microtonality Issue: Letters", Computer Music Journal 11 (4): 8–9 
  4. ^ Carlos, Wendy (1987), "Tuning: At the Crossroads", Computer Music Journal 11 (1): 29–43 

External links[edit]