128/91

Interval information

Ratio	128/91
Factorization	27 × 7-1 × 13-1
Monzo	[7 0 0 -1 0 -1⟩
Size in cents	590.6464¢
Names	smaller huntmic tritone, octave-reduced 91st subharmonic
Color name	thuru 4th
FJS name	[math]\displaystyle{ \text{A4}_{7,13} }[/math]
Special properties	reduced, reduced subharmonic
Tenney height (log2 nd)	13.5078
Weil height (log2 max(n, d))	14
Wilson height (sopfr(nd))	34
Harmonic entropy (Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])	~4.16604 bits
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128/91 is the 91st subharmonic or smaller huntmic tritone, measuring about 590.6¢. It is 640/637 (huntma, about 8.13¢) sharp of 7/5, or 4096/4095 (schismina, about 0.42¢) sharp of 45/32. Its inversion is the larger huntmic tritone, or octave-reduced 91th harmonic 91/64, and the interval that separates them is the small comma 8281/8192, about 18.7¢.

See also

• 91/64 – its octave complement
• Gallery of just intervals