"Certain disciples of the new school, much occupying themselves with the measured dividing of the tempora, display their prolation in notes that are new to us, preferring to devise new methods of their own rather than to continue singing in the old way. Therefore the music of the Divine Office is disturbed with notes of these small values. Moreover, they hinder the melody with hockets, they deprave them with descants, and sometimes they pad them out with upper parts made out of secular songs. The result is that they often seem to be losing sight of the fundamental sources of our melodies in the Antiphoner and Gradual, and forget what it is that they are burying under their superstructures. They may become entirely ignorant of the ecclesiastical modes, which they have already ceased to distinguish and the limits of which they abuse in the prolixity of their notes. The modest rise and temperate descents of plainsong, by which the modes themselves are recognized, are entirely obscured. The voices move incessantly to and fro, intoxicating rather than soothing the ear, while the singers themselves try to convey the emotion of the music by their gestures. The consequence of all this is that devotion, the true aim of all worship, is neglected, and wantonness, which ought to be eschewed, increases."
- Pope John XXII, docta sanctorum patrum, ca. 1324