729/512
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| Ratio | 729/512 |
| Monzo | [-9 6⟩ |
| Size in cents | 611.73001 |
| Name(s) | Pythagorean tritone, Pythagorean augmented fourth, The Tyrant |
| Color name | Lw4, lawa 4th |
| FJS name | A4 |
[sound info] | |
| open this interval in xen-calc | |
729/512, the Pythagorean augmented fourth, may be reached by stacking six perfect fifths (3/2), and reducing by three octaves. It is separated from the 5-limit interval of 64/45 by the schisma (32805/32768), less than 2 ¢.
From a literal point of view, this interval is the only one that rightly bears the name tritone, because it is created by combining three tones: (9/8)3.