Alarm (Catherine Tate) - Gran Wake Up

Up to 12 c. the parallel movement of voices dominated - in the fourth, fifth, octave, later - in the third (cantus gemellus), and also - in parallel sextackords (phoburdon). The whole was a type of organum. In the 12-13 centuries. composers of the Singing School of the chapel of Notre-Dame de Paris, Leonin and Perotin and students of Perotin - R. de Sebillon and P. de la Croix transformed the former organum;in the upper voice (treble) they applied free transitions from parallel to the opposite movement and the ornamental-figurative coloring of the melody, and gradually moved away from modal rhythm. Perotin's upper voices sometimes form a contrasting two-voice, sometimes he skillfully applies imitation.