Musician whose concert profession was shortened by severe muscular complications when he was only 20 and he centered on performing. He been successful the famed Nadia Boulanger as movie director from the American Conservatory in Fontainebleau. He composed The Tempo Signs of Mozart, Twenty-Four Lessons with Chopin, as well as the Piano Approach to Chopin, all books located in either Mozart or Chopin musical school of thought. His family regarded his talent in early stages, and he started his profession as an accompanist to cellist Pierre Fournier when he was 13. His initial instructor was Alfred Cortot.