German composer, born 27th July 1941 in Bensheim-Auerbach, died 29th April 2010 in Bonn. From 1964 to 1970, he was a member of the Karlheinz Stockhausen's ensemble. He co-founded the Feedback Studio, Köln in 1970 and the Feedback Studio Verlag Köln in 1971, with David Johnson (4) and Rolf Gehlhaar.
