JEAN BARR, pianist, has performed throughout the world and has collaborated in concert with many distinguished artists, including Pierre Fournier and Mstislav Rostropovich. The first person in the United States to earn a doctoral degree in accompanying, she studied with Gwendolyn Koldofsky at the University of Southern California, where she later joined the faculty. In 1988 Barr was appointed professor of music at the Eastman School of Music, where, as director of the piano accompanying and chamber music program, she has developed two new graduate degrees in these highly specialized fields.