20/9: Difference between revisions

Interval information
Ratio	20/9
Factorization	22 × 3-2 × 5
Monzo	[2 -2 1⟩
Size in cents	1382.404¢
Name	Ptolemaic 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

Revision as of 22:57, 19 January 2024

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

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

@@ Line 2: / Line 2: @@
 {{Infobox Interval
-| Name = minor ninth
+| Name = Ptolemaic ninth
 }}
-'''20/9''', the Ptolemaic ninth; the ratio between the 20th and 9th harmonics; one octave above [[10/9]].
+'''20/9''', the '''Ptolemaic ninth'''; the ratio between the 20th and 9th harmonics; one octave above [[10/9]].
 [[Category:Nonet]]