625/384
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tetraptolemaic double-augmented fifth
(Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])
625/384, the (smaller) pental neutral sixth or tetraptolemaic double-augmented fifth is a 5-limit interval of about 843.3 cents. It is flat of the Pythagorean double-augmented fifth by four syntonic commas. Equivalently, it is equal to an octave-reduced stack of four classical major thirds minus a fifth, or equal to a classical major third minus a diesis. In the 11-limit it is 6912/6875 flat of 18/11, and 5632/5625 flat of 44/27. In the 13-limit it is 625/624 sharp of 13/8.
See also
- 768/625 – its octave complement