Prolation canon
Examples of prolation canons from the Renaissance include "Le Ray Au Soleyl" by Johannes Ciconia ( late 14th century ) ; the entire "Missa prolationum" by Johannes Ockeghem ( mid-15th century ) , in which each separate section of the mass explores a different prolation ( or different gap between entries and relative speed of each voice ) ; the Agnus Dei from the "Missa L'homme armé super voces musicales" by Josquin des Prez ( late 15th century ) ; and the Agnus Dei from the "Missa L'homme armé" by Pierre de la Rue ( early 16th century ) . 
<triplet> Missa prolationum <subj> Johannes Ockeghem <obj> composer <triplet> Missa L'homme armé super voces musicales <subj> Josquin des Prez <obj> composer