Benno and Sylvia married in 1943 and began concertizing around the world together, performing violin and piano sonatas, as well as appearing in solo recitals and as soloists with major orchestras. For their tenth wedding anniversary in 1953, Sylvia and Benno performed all 10 Beethoven piano and violin sonatas in one day at Town Hall, a feat they would repeat at Alice Tully Hall in 1969.
Benno and Sylvia married in 1943 and started touring together, playing violin and piano sonatas, as well as delivering solo performances with major orchestras. To mark their tenth wedding anniversary in 1953, they achieved a remarkable feat by performing all 10 Beethoven sonatas within one day at Town Hall, an accomplishment they would repeat at Alice Tully Hall in 1969.