Compositional technique, common in early motets, by which a melody or melodic fragment from a traditional Christian chant is repeated in both its original pattern of pitches (color) and a pattern of durations created by the composer (talea). Isorhythm seems to have originated in late 12th-century discant clausulae attributed to Perotinus. Because the chant melody in clausulae moved quickly along with the new melodies, its repetition was required to give the composition sufficient length.

Historical dictionary of sacred music. . 2006.

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  • isorhythm — iso·rhythm …   English syllables

  • isorhythm — …   Useful english dictionary

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