1957 San Diego Youth Symphony Quartet: Ward Beck on Clarinet, Beth Ebey on Flute, Marilyn Rue on Cello, and David Sheet with drumsticks. The San Diego Youth Symphony and Conservatory (SDYS) is the 6th oldest continuously operating youth symphony in the United States, and serves students from its home in Balboa Park. Skill levels range from beginner to pre-professional, with participating students ages 8 to 25.