 He made his debut in "Le Chemineau" by Leroux in 1925 at the Opéra-Comique and went on to sing many other French and Italian roles in the Opéra-Comique repertoire.Musy was a member of the four-member committee which ran the Opéra-Comique after the liberation of Paris during 1944.From 1947 he was a director of staging at the theatre.