Mr. Haas is one of the most sought after performers and teachers of Baroque music in the United States today. He holds a master's degree in historical musicology from UCLA, where he studied harpsichord with Bess Karp. He also studied with Albert Fuller at the Juilliard School and with Alan Curtis in Berkeley and in Amsterdam. Mr. Haas received the top prize in the Paris International Harpsichord Competition in 1975, and then lived in France until 1983, performing in many of the major European early music festivals and teaching at the Ecole nationale de musique in Angoul ê me. In 1985, his formal American debut at Lincoln Center's Alice Tully Hall was highly praised by the New York Times. He is a member of the Aulos Ensemble and Musical Assembly, with whom he has recorded sonatas and suites from Les Nations of Couperin. Mr. Haas participated in the premiere recording of the Bach Goldberg Variation Canons with Alan Curtis, and has also recorded suites for two harpsichords by Gaspard LeRoux with William Christie. His solo CDs of Pieces de clavecin of Jean-Henry D'Anglebert and Suites de clavecin of Forqueray, both on the Wildboar label, have received critical acclaim, as has a recent disc of music by Purcell and his contemporaries. Known for his expertise as a continuo player, Mr. Haas has toured with such distinguished early musicians as Marion Verbruggen, Stephen Preston, Judith Nelson, Laurence Dreyfus, and Phoebe Carrai. A new recording of Bach's Cantata #199 and songs of Henry Purcell with Dawn Upshaw was recently released. Annual summer workshop and festival appearances take him to the San Francisco Early Music Society's Dominican Baroque Workshop, the Eastman Continuo Institute, the International Baroque Institute at Longy, and the Amherst Early Music Festival, where he has served as artistic director of the Baroque Academy since 2002. Mr. Haas is professor of harpsichord and early music at the State University of New York at Stony Brook, and is also on the faculty of the Mannes College of Music. For many years he taught at the Eastman School of Music.