20/9

Interval information

Ratio	20/9
Factorization	22 × 3-2 × 5
Monzo	[2 -2 1⟩
Size in cents	1382.404¢
Name	minor ninth
FJS name	[math]\displaystyle{ \text{M9}^{5} }[/math]
Tenney norm (log2 nd)	7.49185
Weil norm (log2 max(n, d))	8.64386
Wilson norm (sopfr(nd))	15
Open this interval in xen-calc

20/9, the Ptolemaic ninth; the ratio between the 20th and 9th harmonics; one octave above 10/9.

This page is a stub. You can help the Xenharmonic Wiki by expanding it.