Definitions for "Isorhythm"
a technique for musical organization used during the fourteenth and early fifteenth centuries in which the tenor repeats a certain pattern of pitches (the "color") and a certain rhythmic pattern (the "talea"). The color and talea may be different lengths. Used commonly in the motet; also used in some mass settings, for example in the Messe de Notre Dame by Guillaume de Machaut.
A medieval principal of construction which was used most often in motets. This construction is based on a repeating rhythmic pattern in one or more of the voices. Kyrie - The first part of the ordinary of the Mass. This is the only Greek surviving in the Roman Mass.
Putting parts of a melody into a repeated pattern to form one strand in a polyphonic work, usually a motet. Bottom