85/64

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Interval information
Ratio 85/64
Factorization 2-6 × 5 × 17
Monzo [-6 0 1 0 0 0 1
Size in cents 491.26912¢
Names septendecimal harmonic fourth,
archagall fourth
Color name 17oy4, soyo 4th
FJS name [math]\text{P4}^{5,17}[/math]
Special properties reduced,
reduced harmonic
Tenney height (log2 nd) 12.4094
Weil height (log2 max(n, d)) 12.8188
Wilson height (sopfr (nd)) 34
Harmonic entropy
(Shannon, [math]\sqrt{nd}[/math])
~3.90123 bits
open this interval in xen-calc

85/64, the septendecimal harmonic fourth or archagall fourth, is a 17-limit rooted interval that comes rather close to 4/3, from which it differs by 256/255. Notably, 85/64 is one of two intervals relatively simple intervals that can be used to generate a just version of something resembling a superpyth diatonic scale, the other being 128/85.

See also