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Derivation
edit- "It is derived from the difference in pitch between three justly tuned perfect fifths and seven just minor thirds (begun on the same root). An equal definition is that it is the difference between four minor thirds and three minor thirds...In equal temperament, however, the resulting notes are enharmonic equivalents (A♮ = C♭♭♭) and there is no difference."
The above definitions don't make sense. For example, a minor third is 316 cents and the difference between 4 X 316 and 3 X 316 is 316 (1,264-948=316), not 10 cents. Hyacinth (talk) 18:37, 23 December 2011 (UTC)