Hochschule für Musik Freiburg
He has become one of the world's most celebrated oboists, and many composers (including Olivier Messiaen, Luciano Berio, Elliott Carter, Frank Martin, Hans Werner Henze, Witold Lutosławski, Karlheinz Stockhausen, Krzysztof Penderecki, and Isang Yun) have written works for him. He began teaching at the Hochschule für Musik Freiburg, Germany in 1966.