Beethoven started it, the piano’s duologue with the cello, in 1801, with his Seven Variations on “Bei Männern, welche Liebe fühlen” from Mozart’s Die Zauberflöte. Beethoven himself, and many composers from Brahms (1862) through Lera Auerbach (2002) continued to ornament this form. In 1968, Jacqueline du Pré and Daniel Barenboim, with their recording of Brahms’ Cello Sonata no.
