1945: born into the English-speaking minority of Calcutta, going there to school and college, studying piano, music theory and natural sciences. 1957: first compositions. 1965: graduated in science at Calcutta University, thereafter active as conductor and music theory teacher at the Calcutta School of Music. 1968: moved to Cologne, studying (until 1973) composition and electronic music at Cologne Music University. 1971-1972: studied also at the Institute of Sonology, Utrecht University. 1971: began to use computers as a compositional aid. 1982: initiated, 1986 co-founded, 1986-1993 and 1996-2002 chaired GIMIK: Initiative Musik und Informatik Köln. 1982-1994: in charge of Computer Music at the Darmstadt Summer Courses for New Music. 1984-2005: lecturer on Computer Music, Cologne Music University. 1988: Director of Music, XIVth International Computer Music Conference, held in Cologne. 1990-1991: visiting professor of composition, Folkwang University Essen. 1990-94: Artistic Director, Institute of Sonology, The Hague Royal Conservatory. 1994-2006: Professor of Composition and Sonology at the same conservatory. 1994-2010: member of the Académie Internationale de Musique Electroacoustique in Bourges. 2005-2006: visiting professor of composition, School of Music and Performing Arts ESMAE in Porto. Since 2006: Corwin Professor and Head of Composition, Music Department, University of California Santa Barbara.