A new season of performances brings with it announcements of new names to head a number of community arts groups.

Richards I. Jarvis has been named conductor for the recently reorganized Alexandria Chorale. He reports that his "chief aim is to find music that is accessible to both the chorus and the public, includinga standard repertoire and less-performed works. I hope to have a chorus of between 50 to 60 persons to provide an outlet for serious Alexandria musicians."

The new conductor said his first concert, on Dec. 1, will include "Rejoice, Emmanuel Shall Come," an Advent cantata by Louie L. White, a contemporary American composer who lives in New York. Also on the program will be four Christmas motets by Francis Poulenc and "O Magnum Mysterium," a mass written by Vittoria to be performed during the Christmas season.

Concerts in March and May will feature the music of Aaron Copeland and Leonard Bernstein, Jarvis said.

A professor of music at the University of Maryland, Jarvis directs the Mount Vernon Singers, acts as organist and choirmaster at St. George's Episcopal Church in Arlington and performs as a pianist and harpsichordist.

His background includes study of vocal production with Phyllis Curtin and Mark Pearson, choral conducting with Lorna Cooke deVaron, orchestral conducting with Frederick Prausnitz and performance practice with Daniel Pinkham. Jarvis holds a master's degree in choral conducting from the New England Conservatory of Music, where he was assistant conductor of the chorus.