PerotinAmazon. com It would be impossible to adequately describe the inherent haunting beauty of Perotin's music, or to fully detail its far reaching influence in latter 12th century France. The opening "Viderunt omnes" is a perfect illustration of the surprising vitality and highly charged sense of forward motion that can be obtained with relatively simple rhythmic impulses and harmonic devices. The male voices of the Hilliard Ensemble generate an