Franco-Flemish theorist and composer. Singer at Cambrai in 1460, where he met Dufay. By 1475 he was in Italy, serving at the court of Ferdinand of Sicily and Aragon; though he is known to have returned to France and his homeland in 1487, he probably remained in his Italian post till his patron died in 1494. Later he was a canon of Nivelles. He was the most important theorist of his time, writing twelve treatises of which two were printed. His surviving musical output consists of four Masses, two motets, a Lamentation setting, seven chansons and one Italian song.