The Chantilly Codex is the pivotal music document of the 14th century and one of the monuments of medieval music. Many of the shadowy greats of early French composition--including Solage, Cordier, and Andrieu--are represented here. The music of the ars subtilior--the subtle art--is eccentric, whimsical, extravagant; it contains the widest diversity of emotion. The Ensemble Organum, directed by Marcel Pérès, performs these works with stylistic deftness. --Joshua Cody

TREFOIL is a trio of singer-instrumentalists long active in early music, with experience in such ensembles as Concert Royal, Les Arts Florissants, New York's Ensemble for Early Music, Pomerium, Clarion Music Society, Piffaro, My Lord Chamberlain's Consort, and other groups. The trio debuted in New York and Philadelphia early in 2000 with a program of 14th century French ars subtilior song. Trefoil has appeared in concerts and master classes at The Cloisters, Temple University, Vassar College, Middlebury College, Vermont Millennium Arts Festival, Museum Series of Providence, Boston College, Currier Museum of Art in Manchester, NH, Neighborhood Music School in New Haven, 2002 Amherst Early Music Festival, and 37th Annual International Congress on Medieval Studies at Kalamazoo. The trio has also made a series of joint appearances with the Folger Concert in Washington D.C.