Used in a general sense to refer to microtonal intervals approximately 1/8 the size of the diatonic whole-tone, measuring approximately 25 cents. Also sometimes used to refer to a syntonic comma or pythagorean comma (as, for example, by Charles Ives with the latter).
Calculated as the 48th root of 2 -- 48√2, or 2(1/48) -- an irrational proportion with the approximate ratio of 1 : 1.014545335, and an interval size of exactly 25 cents. It is the size of one degree, and thus the basic "step" size, in the 48-edo (or 48-tET) scale. Synonymous with 2mu.
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