This setting of a gregorian antiphon for the Nativity is the kind of compositional tour-de-force for which Mouton was much admired in his day – a lush sonic tapestry is created by the serenely unfolding strands of a quadruple canon. In the principal sources, there are only 4 notated voices (Choir II in this edition); performers were meant to realize the 4 unnotated canonic parts (Choir I) by following clues in the manuscript. This edition includes as a prelude to the motet the very beautiful plainsong tune on which the motet is based; it is not readily available in modern chantbooks.

Winner – 2003 MPA Paul Revere Award, 2nd Prize.