 He also studied composition in 1967 with Karlheinz Stockhausen at the University of California, Davis , and electronic music with David Tudor and Anthony Gnazzo.As a performer, he served as a controller of the live electronics for Stockhausen’s 1967 Darmstadt collective-composition project, "Ensemble" , and performed on synthesizer in the 25th anniversary concert of Terry Riley's "In C" in 1989, released as a recording in 1995 on New Albion Records CD NA071.As a composer he is primarily known for his work in electronic media, and is Professor of Composition and Director of the E. L. Wiegand Composition Studio at the San Francisco Conservatory.