modal determinant, M.D.

The numerator of the subharmonic series of which a Schlesinger harmonia is a section. The diatonic Dorian Harmonia 22/22 22/20 22/18 22/16 22/14 22/13 22/12 22/11 has a M.D of 22.

[from John Chalmers, Divisions of the Tetrachord]

(see also Kathleen Schlesinger, The Greek Aulos [1939]).

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