The harmonic scale is a "super-just" musical scale allowing extended just intonation, beyond 5-limit to the 19th harmonic (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.
The 21st is a natural seventh above G, but not a great interval above C, and the 27th is a just fifth above D. Play diatonic scaleⓘ 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, Franz Richter Herf and Gosheven.
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