81/49

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Interval information
Ratio 81/49
Factorization 34 × 7-2
Monzo [0 4 0 -2
Size in cents 870.1682¢
Names Septimal augmented fifth,
novel submajor sixth
FJS name [math]\text{A5}_{7,7}[/math]
Special properties reduced
Tenney height (log2 nd) 11.9546
Weil height (log2 max(n, d)) 12.6797
Wilson height (sopfr(nd)) 26
Harmonic entropy
(Shannon, [math]\sqrt{nd}[/math])
~4.13268 bits
Open this interval in xen-calc

81/49, the novel submajor sixth or septimal augmented fifth, is a 7-limit interval. It is the interval created by stacking two 9/7s, and is equated to 5/3 in sensamagic (245/243) temperaments, including no-twos BPS.

See also

  • 98/81, its octave complement
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