by Alicia Anstead[gallery link='file' columns='2']Ask Jack Megan, director of the Office for the Arts, to name the most memorable quality about Jameson Marvin, director of choral activities at Harvard, and he says something only a longtime colleague and admirer could get away with: "His mustache!" But give Megan 10 more seconds, and you'll hear an answer that also shows the depth of a longtime colleague and admirer. "Jim is a standard setter," says Megan. "When you go to hear the music making he leads, it's always unfailingly delivered -- wonderful intonation, warm and open vowels, beautifully shaped lines. It lifts above everything; it floats through the room."After 32 years of making music at Harvard with the Holden Choral Ensembles, Marvin retires this year and will be celebrated at a musical gathering 8 p.m. Friday April 30 at Sanders Theatre. But even after Marvin moves into a private life of teaching, directing, composing, reading, researching and gardening, his legacy remains -- in part because Marvin is so devoted and knowledgeable, but also because he has been known to tell students: "I talked to Bach last night and he told me how this piece is supposed to go."