128/77

128/77, the keenanismic major sixth or octave-reduced 77th subharmonic, is an interval that is is 385/384 (4.5 cents) flatter than 5/3. It is almost exactly 1/7th of a cent flatter than the 880 cent major sixth of 15edo.

Interval information

Ratio	128/77
Factorization	27 × 7-1 × 11-1
Monzo	[7 0 0 -1 -1⟩
Size in cents	879.8562¢
Names	keenanismic major sixth, octave-reduced 77th subharmonic
FJS name	[math]\displaystyle{ \text{M6}_{7,11} }[/math]
Special properties	reduced, reduced subharmonic
Tenney norm (log2 nd)	13.2668
Weil norm (log2 max(n, d))	14
Wilson norm (sopfr(nd))	32
[[File:Ji-{{#regex:128/77|/(\S+)\/(\S+)/|\1-\2}}-csound-foscil-220hz.mp3|270px]] [[:File:Ji-{{#regex:128/77|/(\S+)\/(\S+)/|\1-\2}}-csound-foscil-220hz.mp3|[sound info]]]
Open this interval in xen-calc

See also

• 77/64 -- its octave complement
• Gallery of just intervals