Charles Weaver is on the faculty of the Juilliard School, where he teaches performance practice and historical music theory. He has been assistant conductor for Juilliard Opera and has participated in opera productions at the University of Maryland, the Cleveland Institute of Music, Princeton University, Yale University, and the Boston Early Music Festival. As a collaborative musician, he has performed with the Orchestra of St. Luke’s, the New York Philharmonic, the Philadelphia Orchestra, the Minnesota Orchestra, and the Virginia Symphony. In addition to being a regular member of the ensemble Quicksilver, his chamber-music projects have included engagements with Blue Heron, Piffaro, Chamber Music Society of Lincoln Center, the Folger Consort, Apollo’s Fire, the Newberry Consort, and Musica Pacifica. He is organist and choirmaster at St. Mary’s Church in Norwalk, Connecticut, where he specializes in the liturgical performance of medieval and renaissance music. He holds a PhD in music theory from the City University of New York. His research interests include the rhythm of Gregorian chant and the history of the theory of harmony.