 During 1921/22 he was also playing the viola in the Kolisch Quartet.In 1922 he moved north, to Berlin, where he worked as a theatre musician.Together with Josef Rufer (1893–1985) and Karl Wiener (1891–1942) and Schoenberg's pupil Max Deutsch (1892–1982), he was a founder of the Society for Contemporary Music Performances in Berlin (").