Movement 1: Kyrie
Movement 2: Gloria
Movement 3: Credo
Movement 4: Sanctus and Benedictus
Movement 5: Agnus Dei
Paraphrased plainsong is the main constructional principle, using chants in differing modes (in movement order: modes I, VII, IV, VIII, VI). Indeed these modes are so varied that it has been suggested Josquin was deliberately creating a virtuoso exercise in modal relationships – making this the (unusual) raison d’être for the whole enterprise. Maybe, though it certainly leads to unpopular things for modern choirs like uneven voice-ranges (and the Creed has to be transposed up a fourth to make it work at all). So what are the rewards? They are subtle, but can be as evident to us as they clearly were to the first listeners.
The main delight is in the canons, on which the five-voice movements (the Credo, Sanctus and Agnus) rely. All three movements have two chant-based voices in pure canon at the fifth; and to intensify the impact of this Josquin decided on occasion to write triple-time melodies over and around the canons. This led to the most famous passage of all: the section in the Creed which begins at ‘Qui cum Patre’. For theorists as far removed in time from Josquin as the middle of the eighteenth century this proved to be irresistible material, and it was quoted endlessly. The two tenor parts indulge in simple canonic declamation, while the altos and basses take up the music of both. Over this the sopranos sing a slow triplet melody of effortless beauty. One can only guess at why so many writers, from periods when polyphony had long since been a dead art, were so impressed by this, but elegance in complexity must surely have been one reason.
from notes by Peter Phillips © 2011