“As a symphonic conductor, he held posts with the Belgian National Orchestra (1969-73), Cincinnati SO (1980-86) and SWR Symphony Baden-Baden and Freiburg (1986-89). He also served as a Principal Guest Conductor of the BBC Symphony Orchestra (1978-81). He retired from conducting 2014. His service to contemporary music was immense and he championed works by György Ligeti, Karlheinz Stockhausen, Bernd Alois Zimmermann, Hans Werner Henze, Betsy Jolas, Isang Yun and Henri Pousseur, as well as earlier 20th-century masters.” – Gramophone