Featured composer at festivals and concert series in Germany and abroad: Amsterdam (Holland Festival), Antwerp,
Bremen, Brussels (Ars Musica), Chicago, Cologne (Musik der Zeit), Duisburg, Frankfurt am Main, Graz (Steirischer Herbst),
Huddersfield, London, Oslo, Paris (Festival d'Automne), Reggio Emilia (di nuovo musica), Saarbrücken (Musik im 20.
Jahrhundert), Stuttgart (Tage für neue Musik), Vienna (Wien modern), Viitasaari, Weingarten, Witten (Tage für neue
Kammermusik), Zurich (Tage für neue Musik), etc.Member of the "Akademien der Künste" in Berlin, Hamburg, Leipzig,
Mannheim and Munich and the "Academie voor Wettenschapen, Letteren en Schone Kunsten van Belgie"
| 1935 | Born in Stuttgart on 27 November |
| 1955-1958 | Studies at the Musikhochschule in Stuttgart: piano with Jürgen Uhde, theory and counterpoint with Johann Nepomuk David |
| 1958-1960 | Composition studies with Luigi Nono in Venice |
| 1962 | First public appearance as composer at the Biennale in Venice and at the Internationale Ferienkurse für Neue Musik in Darmstadt |
| 1965 | Works at the electronic studio of the University of Ghent Cultural Prize for Music of the city of Munich |
| 1966-1970 | Theory teacher at the Musikhochschule in Stuttgart |
| 1968 | Composition Prize of the city of Stuttgart |
| 1970-1976 | Instructor of music at the Pädagogische Hochschule in Ludwigsburg |
| 1972 | Coordinator of the composition studios at the Darmstädter Ferienkurse für Neue Musik |
| 1972 | Bach Prize of Hamburg |
| 1972-1973 | Teaches master class for composition at the University of Basel |
| 1976-1981 | Professor of composition at the Musikhochschule in Hanover |
| 1978, 1982 | Instructor at the "Cursos Latinoamericanos de musica contemporanea" in Brazil and in the Dominican Republic |
| since 1978 | Instructor at the Darmstädter Ferienkurse für Neue Musik |
| 1981-1999 | Professor of composition at the Musikhochschule in Stuttgart |
| 1982 | BComposition seminars in Toronto |
| 1984 | Composition seminars in Buenos Aires, Santiago de Chile and Tokyo |
| 1986 | Week-long seminar in Villafranca, Spain |
| 1987 | Workshop in Middelburg/The Netherlands |
| 1988 | ps in Blonay, Switzerland (with the Ensemble Modern) and Weingarten |
| 1989 | Week-long seminars in Oslo and at the Paris Conservatoire |
| 1992 | Lectures in St. Petersburg |
| 1993 | Courses in Akiyoshidai, Japan, workshop at the Villa Musica, Mainz |
| 1994 | Week-long seminar with the "Klangforum Wien" in Vienna |
| 1997 | Prize of the Ernst-von-Siemens-Foundation
Workshop in Chicago and Urbana |
| 1998 | Workshops in Viitasaari, Finland |
| 1999 | Composition Seminar at Acanthes in Villeneuve-lès-Avignon |
| 2001 | Honorary Doctorate of the Musikhochschule Hannover
Composition seminars in New York (Juilliard School, Princeton University) |
| 2001/02 | Fellowship of the Wissenschaftskolleg Berlin |
| 2002 | Workshop in Porvoo/Finland |
| 2004 | Royal Philharmonic Society Award London for the III. String Quartet GRIDO |
| 2005 | Composer-in-Residence at the Lucerne Festival |
| 2005 | Charles Cros Prize for ECM-CD recording of opera ‘Das Maedchen mit den Schwefelhoelzern’ |
