Pianist and conductor, born in Nyon, Switzerland, of French parents. After winning the first prize for piano-playing at the Paris Conservatoire in 1896, he became known in France as an outstanding player of Beethoven's concertos. In 1905, with Jacques Thibaud and Pablo Casals, he founded a trio whose chamber music performances won great renown. He was professor of the pianoforte at the Paris Conservatoire (1917--20), and author of several books on musical appreciation, interpretation, and piano technique.