81/40

The ratio of 81/40 is essentially a syntonic comma (81/80) but one octave higher. This interval spans the size of 1221.506290 cents.

Interval information

Ratio	81/40
Factorization	2-3 × 34 × 5-1
Monzo	[-3 4 -1⟩
Size in cents	1221.506¢
Name	syntonic octave
FJS name	[math]\displaystyle{ \text{P8}_{5} }[/math]
Tenney norm (log2 nd)	11.6618
Weil norm (log2 max(n, d))	12.6797
Wilson norm (sopfr(nd))	23
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