French musical art during the fifteenth and sixteenth centuries found one of its highest forms of expression in the chanson, in musical settings of poems of a popular nature, much closer to the heart of the people than the complicated and refined poetry of the grands rhétori-queurs. With composers of the Burgundian School—Binchois (d. 1467), Dufay (d. 1474), and other musicians connected with the Burgundian Court—the chanson, usually in one of the formes fixes (rondeau, virelai, ballade), reached a height hardly surpassed since: simple, elegant settings for one or two voices with instrumental accompaniment, in marked on‐trast to the complex and recondite ars nova of the preceding century. Even in their sacred music, composers of the Burgundian School made frequent use of the secular song, building their motets and masses upon popular melodies as cantus firmi (tenor melodies upon which a polyphonic structure was erected). With the rise of the Netherlandish School in the latter half of the fifteenth century and with its trend toward a more vocal style, chiefly under the influence of Ockeghem, Buynois, and Obrecht, polyphonic settings of the chanson became popular. In these, music and poetry alike were characterized by greater flexibility in composition: the formes fixes gradually gave way to free forms, generally light, graceful, and spirited in tone; and the music, although adhering to the imitative style of the motet, achieved a similar lightness and grace through the use of quick rhythmic patterns, short phrases with many repeated sections, and a leaning toward homophonic techniques. Most of the great Flemish composers, headed by Josquin des Prés, included music of this type among their productions; but it is perhaps Clément Janequin who best exemplifies the chanson at its gayest, its lightest, and its most frivolous. The popularity of the chanson is witnessed, further, not only by many chansonniers in MS from the late fifteenth century but also by the publication of nearly 600 chansons during the short space of twenty years (1529-49) by two editors alone—Pierre Attaingnant at Paris and Jacques Moderne at Lyons.