Parahemif comma

Interval information

Ratio	1605632/1594323
Factorization	215 × 3-13 × 72
Monzo	[15 -13 0 2⟩
Size in cents	12.2368¢
Name	Hemif comma
FJS name	[math]\displaystyle{ \text{dd3}^{7,7} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	41.2192
Weil norm (log2 max(n, d))	41.2294
Wilson norm (sopfr(nd))	83
Comma size	small
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The Hemif comma is a small 7-limit or 2.3.7 subgroup comma measuring about 12.237 cents. It's the difference between 17-comma and two 64/63s.

Temperaments

Tempering out this comma in the 2.3.7 subgroup leads to the Hemif temperament.

Etymology

The name Hemif comma was named after the Hemif temperament, which only tempered out this comma in 2.3.7 subgroup.