The Duple reference article from the English Wikipedia on 24-Apr-2004
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Duple

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In music, duple refers to duple meter. Duple is also a duration 3/2 the regular note value duration in compound and or triple meter. An irrational rhythm, it may also be used as a polyrhythm when played against the regular duration.

In relation to duple time triple meter rhythms would be triplets.

See also: tuple

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