Ed16/9
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ED16/9 is the equal division of the the Pythagorean minor seventh (16/9) into n parts.
Division of 16/9 into equal parts can be conceived of as to directly use this interval as an equivalence, or not. The utility of 16/9 (or another seventh) as a base though, is apparent by being used at the base of so much modern tonal harmony.
An ED16/9 can be generated by taking every other tone of an ED4/3, so even-numbered ED16/9s can also be used for neo-Medieval harmony.