63/62

63/62, the co-archytas comma, is a small 31-limit (specifically 2.3.7.31-subgroup) comma measuring about 27.7 cents. It is the difference between 31/27 and 7/6, between 31/18 and 7/4, between 31/24 and 21/16, between 31/28 and 9/8, and between 31/21 and 3/2. It lies next to 64/63 (archytas comma) and combines with it to 32/31, the smaller 31-limit quartertone.

Interval information

Ratio	63/62
Subgroup monzo	2.3.7.31 [-1 2 1 -1⟩
Size in cents	27.70034¢
Name	co-archytas comma
Color name	31uz2, thiwuzo 2nd, Thiwuzo comma
FJS name	[math]\displaystyle{ \text{m2}^{7}_{31} }[/math]
Special properties	superparticular, reduced
Tenney norm (log2 nd)	11.9315
Weil norm (log2 max(n, d))	11.9546
Wilson norm (sopfr(nd))	46
Comma size	small
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Etymology

This comma was known as the co-archyta[s] comma no later than 2020, most likely due to its numerical adjacency to the archytas comma, 64/63.

See also

• List of superparticular intervals