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 composition and electronic music at Cologne Music University until 1973. 1971-72: also studied at the Institute of Sonology, Utrecht University. 1971: began to use computers as a compositional aid. 1982: initiated, 1986 co-founded, chaired (1986-93, 1996-2002) GIMIK: Initiative Musik und Informatik Köln. 1982-1994: head 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, Royal Conservatoire The Hague. 1994-2006: Professor of Composition and Sonology at the same institution. 1994-2010: member of the Académie Internationale de Musique Electroacoustique in Bourges. 2005-06: 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.