Although his repertoire included Bach , Mozart , Chopin , Schumann , Liszt and Brahms , Kempff was particularly well known for his interpretations of the music of Ludwig van Beethoven and Franz Schubert . He recorded the complete collection of their piano sonatas .
Although his repertory included Bach , Liszt , Chopin , Schumann , and Brahms , Kempff was often well known for his interpretations of the music of Ludwig van Beethoven and Franz Schubert , both of whose complete sonatas he also recorded .