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Encyclopedia of Microtonal Music Theory

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tone of disjunction

[Joe Monzo]

The gap between two separated musical tetrachords is called the disjunction. In ancient Greek theory it was always the frequency ratio 9/8 (~203.9100017 cents). Below is a schematic diagram:

                      --  E
                     |
                     |    D
tetrachord diezeugmenon
                     |    C
                     |
                      --  B
  tone of disjunction  <
                      --  A
                     |
                     |    G
       tetrachord meson
                     |    F
                     |
                      --  E
		
. . . . . . . . .

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