The next year he made his debut in Copenhagen playing the Mendelssohn Violin Concerto.
He lived in England for some time from 1929, where he appeared in concerts with artists such as Maria Jeritza, Feodor Chaliapin, Jan Kiepura and Paul Robeson.
[citation needed] In September 1952 he made his benchmark Deutsche Grammophon recordings of all ten Beethoven violin sonatas with Wilhelm Kempff in the Konzerthaus, Mozartsaal, Vienna.
[citation needed] He held teaching posts in Salzburg, Vienna and Lucerne.
[4] He gave the 1959 premiere of his friend Karl Amadeus Hartmann's revised Concerto funebre.