9/4

9/4, the Pythagorean major ninth, is an interval which is equal to a stack of two perfect fifths ((3/2)²); the ratio between the 4th and 9th harmonics; one octave above 9/8. See also ed9/4.

Interval information

Ratio	9/4
Factorization	2-2 × 32
Monzo	[-2 2⟩
Size in cents	1403.91¢
Name	Pythagorean major ninth
Color name	w9, wa 9th
FJS name	[math]\displaystyle{ \text{M9} }[/math]
Tenney norm (log2 nd)	5.16993
Weil norm (log2 max(n, d))	6.33985
Wilson norm (sopfr(nd))	10
[sound info]
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