After her graduation at thirteen, an exception was made for her to take harmony classes at the Conservatoire, which did not normally allow students under fourteen in harmony and composition. In 1891, she won the Prix de Harmonie and in 1896 she won the Prix de Contrepoint Fugue et Composition. Her professors Théodore Dubois and Jules Massenet encouraged her to compose, but she was reluctant to attract attention; she hid "Andante Religioso" for six weeks before she showed it to them. At fifteen, Renié gave her first solo recital in Paris.