64/49

Interval information

Ratio	64/49
Factorization	26 × 7-2
Monzo	[6 0 0 -2⟩
Size in cents	462.3482¢
Names	septimal subfourth, septatonic ultramajor third, octave-reduced 49th subharmonic
FJS name	[math]\displaystyle{ \text{M3}_{7,7} }[/math]
Special properties	reduced, reduced subharmonic
Tenney norm (log2 nd)	11.6147
Weil norm (log2 max(n, d))	12
Wilson norm (sopfr(nd))	26
[sound info]
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64/49, the septimal subfourth, also known as the septatonic ultramajor third or octave-reduced 49th subharmonic, is equal to two supermajor seconds of 8/7, and is the interval between 21/16 and 12/7. it is 1029/1024 flat of 21/16, and tempering out 1029/1024 leads to slendric temperament, where three supermajor seconds make up a fifth.

See also

• 49/32 - its octave complement
• Gallery of just intervals
• File:jid_64_49_pluck_adu_dr220.mp3 - another sound example