9/1

Interval information

Ratio	9/1
Factorization	32
Monzo	[0 2⟩
Size in cents	3803.91¢
Names	9th harmonic, nonuple
Color name	c3w2, tricowa 2nd
FJS name	[math]\displaystyle{ \text{M23} }[/math]
Special properties	harmonic
Tenney height (log2 nd)	3.16993
Weil height (log2 max(n, d))	6.33985
Wilson height (sopfr(nd))	6
Harmonic entropy (Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])	~2.65687 bits
[sound info]
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9/1, the 9th harmonic or nonuple, is the harmonic past 8/1 and before 10/1. It is three octaves above 9/8. In harmony, it can be approached as a stack of two 3/1's, making chords like 1–3–9.

See also

• Ed9