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Interval information
Ratio 121/64
Monzo [-6 0 0 2
Size in cents 1102.63588
Name(s) Alpharabian major seventh,
octave-reduced 121st harmonic
FJS name m7121
open this interval in xen-calc

121/64, the Alpharabian major seventh, or octave-reduced 121st harmonic, is an 11-limit interval that results from stacking two 11/8 fourths. While the FJS and other systems that treat 33/32 as a comma end up designating 121/64 as a "minor seventh", this interval actually functions as a kind of major seventh- a property that is particularly evident when you consider that its octave complement is a type of diatonic semitone.

See also