640/637

Interval information

Ratio	640/637
Factorization	27 × 5 × 7-2 × 13-1
Monzo	[7 0 1 -2 0 -1⟩
Size in cents	8.134239¢
Name	huntma
Color name	3urry-2, thururuyo negative 2nd, Thururuyo comma
FJS name	[math]\displaystyle{ \text{d}{-2}^{5}_{7,7,13} }[/math]
Special properties	reduced
Tenney height (log2 nd)	18.6371
Weil height (log2 max(n, d))	18.6439
Wilson height (sopfr(nd))	46
Harmonic entropy (Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])	~1.79456 bits
Comma size	small
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640/637, the huntma, is a 13-limit small comma. It is the amount by which two 8/7s exceed 13/10. By tempering it out is defined the huntmic temperament, which enables the huntmic chords.

See also

• Small comma