He recorded several renderings of 20th century music, such as from Schoenberg (Pierrot Lunaire, Erwartung), Varèse, Messiaen, and contemporary American composers (e.g., Elliott Carter, Stefan Wolpe, and George Crumb), mostly with the Contemporary Chamber Ensemble, the Orchestra of the 20th Century, and the Ensemble 21.
After the successful completion of her studies in 1994 (with a production of Béla Bartók's opera Duke Bluebeard's Castle in her parish church and in the Kunsthaus Tacheles, she spent some time at first as an assistant director at the opera house in Graz, where in 1997 she did her own productions of Schoenberg's Erwartung, Bartok's Duke Bluebeard's Castle and a world premiere of her own piece Cats Have Seven Lives.
In 2010 his opera Tilt, on a libretto by Roland Quitt after the diary of Sir Walter Raleigh, was performed as part of the triple bill entitled Amazonas (with Der Einsturz des Himmels and In Erwartung) at the Munich Biennale, also in São Paulo and Rotterdam.
Erwartung (1924) and La voix humaine (1959) closely follow the traditional definition, while in Eight Songs for a Mad King (1969) by Peter Maxwell Davies, the instrumentalists are brought to the stage to participate in the action.
At Salzburg, in 1972, she was applauded for her performance in Schönberg's Erwartung, with Michael Gielen conducting.