ROLF GEHLHAAR - Wege / Ways LPRolf Gehlhaar (1943 2019) was an instrumental and electronic music composer, and a pioneer in computer controlled interactive music. He grew up in the US where he studied philosophy and composition at Yale University. In 1967 he moved back to Germany to become Stockhausens personal assistant and member of his performing ensemble. In 1969 Gehlhaar co founded, along with Johannes Fritsch (Metaphon 012) and David Johnson, the Feedback Studios in Cologne,