13/9

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Interval information
Ratio 13/9
Monzo |0 -2 0 0 0 1>
Size in cents 636.61766
Name(s) high tritone
tridecimal diminished fifth
Color name 3o5, tho 5th

[sound info]

In 13-limit just intonation, 13/9 is a high tritone measuring about 636.6¢. It appears between the 9th and 13th overtones of the harmonic series. Its inversion is 18/13, a low tritone.

See also