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• 20:34, 24 February 2026 Inthar talk contribs created page Comma pump (Created page with "A '''comma pump''' is a chord progression whose starting and ending points differ by a comma in JI. The I-vi-ii-V-I progression is a Meantone or 81/80 comma pump: CEG -> ACEA -> DFA -> GDGB -> CEGC In non-Meantone tunings, attempting this comma pump results in the end point flatter by 81/80 relative to the starting point. There is some ambiguity in this term depending on whether the comma in question is tempered out or not. If the comma is tempered out the chord...")