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Interval information
Ratio 126/125
Factorization 2 × 32 × 5-3 × 7
Monzo [1 2 -3 1
Size in cents 13.794767¢
Names starling comma,
septimal semicomma
Color name zg32, zotrigu 2nd,
Zotrigu comma
FJS name [math]\text{d2}^{7}_{5,5,5}[/math]
Special properties superparticular,
Tenney height (log2 nd) 13.9431
Weil height (log2 max(n, d)) 13.9546
Wilson height (sopfr (nd)) 30
Harmonic entropy
(Shannon, [math]\sqrt{n\cdot d}[/math])
~3.11644 bits
Comma size small
open this interval in xen-calc
English Wikipedia has an article on:

The starling comma or septimal semicomma, 126/125 (about 13.8 cents), is the superparticular 7-limit comma which is the difference between 36/35 (septimal quartertone) and 50/49 (jubilisma). In terms of just intervals, it is the amount by which 12/7 falls short of three 6/5 minor thirds. It is also the amount by which two 5/3 major sixths (octave-reduced, 25/18) fall short of the 7/5 tritone, and the amount by which three 5/3's (octave-reduced) fall short of the 7/6 septimal minor third. It can also be found when comparing the conventional 5-limit minor third and major tenth to the nearest Bohlen–Pierce intervals.


Tempering it out alone in the 7-limit leads to the starling temperament, and enables starling chords. See Starling family for the rank-3 temperament family where it is tempered out. See starling temperaments for a collection of rank-2 temperaments where it is tempered out.

See also