Pete Nowlen, whose VITA Symphony Orchestra will perform Saturday at CSUS, has two audiences to serve. First there is the classical-music audience that comes to hear and enjoy this group of emerging professional musicians. Then there is the group of artists themselves. VITA stands for Vocal and Instrumental Teaching Artists -- and Nowlen helps to guide the musicians into a successful, satisfying career. Saturday's program "all flows from (Antonin Dvorak's) New World Symphony," Nowlen said. "One of the reasons that I wanted it to flow from that piece was Dvorak's intent when he composed it. It really pointed the way for American music to come." Other pieces on the program, all from the 2