Hemimage comma

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Interval information
Ratio 10976/10935
Monzo [5 -7 -1 3
Size in cents 6.47900
Name(s) hemimage
open this interval in xen-calc

The hemimage, 10976/10935, is a 7-limit comma measuring about 6.5 cents. It marks the difference between a classic diatonic semitone (16/15) and a stack of three septimal major thirds (9/7) octave reduced, or between a classic whole tone (10/9) and a stack of three septimal third tones (28/27), therefore interesting to those who work extensively with third tones. It is also the difference between 245/243 and 225/224, the two simplest commas to define the 7-limit magic temperament. Tempering it out leads to the hemimage family of temperaments.

See also