137438953472/137231006679

Revision as of 23:56, 18 September 2025 by Flirora (talk | contribs) (Flirora moved page 7-13-comma to 137438953472/137231006679 over redirect: inappropriate name (the stacked interval is 39/32, not 13/8))

137438953472/137231006679, the 7-13-comma, is a 13-limit unnoticeable comma of about 2.62 ¢. It is the amount by which a stack of of 39/32's fall short of two octaves.

Interval information
Ratio 137438953472/137231006679
Factorization 237 × 3-7 × 13-7
Monzo [37 -7 0 0 0 -7
Size in cents 2.621362¢
Name 7-13-comma
Color name Sasa-septhu comma
FJS name [math]\displaystyle{ \text{AAA1}_{13,13,13,13,13,13,13} }[/math]
Special properties reduced,
reduced subharmonic
Tenney norm (log2 nd) 73.9978
Weil norm (log2 max(n, d)) 74
Wilson norm (sopfr(nd)) 186
Comma size unnoticeable
Open this interval in xen-calc