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organum

OR-gah-num

[Latin]

Term referring to the earliest kind of polyphonic music. Organum developed from the practice of adding voices above a plain chant (cantus firmus); these added voices at first ran parallel to the plain chant at an interval of a fourth or fifth. Later they began to move about more freely. Organum was in use from about the 12th through the 13th centuries.

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Last Updated: 2013-02-14 19:22:30
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