One of the world's great pianists, his specialties were composers
Frederic Chopin and Franz Liszt, but he had a huge repertory that also
covered such composers as Debussy and Beethoven. He recorded all of
Beethoven's piano sonatas, as well as the Diabelli Variations. He also
recorded all five Beethoven piano concertos twice, with Beethoven's
Piano Concerto No. 5 (the Emperor) getting a third recording in digital
stereo in the mid 1980s.