MARK MUELLER (tenor) made his Northern California musical debut at the Monterey Jazz Festival in 1971 when he backed up Carmen MacRae. Since then, Mr. Mueller has performed with over twenty vocal and instrumental ensembles in the greater Bay Area, including the Albany Consort, the American Bach Soloists, the Baroque Choral Guild, the California Bach Society, the Philharmonia Baroque Chorale and the San Francisco Choral Artists. He is also the Program Administrator for the Young Musicians Program at UC Berkeley and the Founding Director of Ensemble Sol.