9/4
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| Ratio | 9/4 |
| Factorization | 2-2 × 32 |
| Monzo | [-2 2⟩ |
| Size in cents | 1403.91¢ |
| Name | Pythagorean ninth |
| Color name | w9, wa 9th |
| FJS name | [math]\text{M9}[/math] |
| Tenney height (log2 nd) | 5.16993 |
| Weil height (log2 max(n, d)) | 6.33985 |
| Wilson height (sopfr (nd)) | 10 |
| Harmonic entropy (Shannon, [math]\sqrt{n\cdot d}[/math]) |
~4.52203 bits |
[sound info] | |
| open this interval in xen-calc | |
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.