128/91: Difference between revisions

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Created page with "{{Infobox Interval | Ratio = 128/91 | Monzo = 7 0 0 -1 0 -1 | Cents = 590.64643 | Name = smaller huntmic tritone <br>91st subharmonic | Color name = thuru 4th | FJS name = A4<..."
 
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{{Infobox Interval
{{Infobox Interval
| Ratio = 128/91
| Name = smaller huntmic tritone, octave-reduced 91st subharmonic
| Monzo = 7 0 0 -1 0 -1
| Cents = 590.64643
| Name = smaller huntmic tritone <br>91st subharmonic
| Color name = thuru 4th
| Color name = thuru 4th
| FJS name = A4<sub>91</sub>
}}
}}
 
'''128/91''' is the '''91st subharmonic''' or '''smaller huntmic tritone''', measuring about 590.6 [[cent]]s. It is [[640/637]] (huntma, about 8.13{{c}}) sharp of [[7/5]], or [[4096/4095]] (minisma, about 0.42{{c}}) 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{{c}}.
In [[13-limit]] [[just intonation]], '''128/91''' is the '''91st subharmonic''' or '''smaller huntmic tritone''', measuring about 590.. 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..


== See also ==
== See also ==
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* [[Gallery of just intervals]]
* [[Gallery of just intervals]]


[[Category:13-limit]]
[[Category:Tritone]]
[[Category:Tritone]]

Latest revision as of 10:23, 3 March 2026

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 norm (log2 nd) 13.5078
Weil norm (log2 max(n, d)) 14
Wilson norm (sopfr(nd)) 34
Open this interval in xen-calc

128/91 is the 91st subharmonic or smaller huntmic tritone, measuring about 590.6 cents. It is 640/637 (huntma, about 8.13 ¢) sharp of 7/5, or 4096/4095 (minisma, 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