9/4

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Interval information
Ratio 9/4
Monzo [-2 2
Size in cents 1403.91000
Name(s) Pythagorean ninth
Color name w9, wa 9th
FJS name M9

[sound info]
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9/4, the Pythagorean ninth; two perfect fifths (3/2 * 3/2); the ratio between the 4th and 9th harmonics; one octave above 9/8.