Rapée was born in Budapest, Hungary where he studied as a pianist and later conductor at the Royal National Hungarian Academy of Music. Later, he was assistant conductor to Ernst von Schuch in Dresden. As a composer, his first piano concerto was played by the Philharmonic Orchestra of Vienna, and after a tour of America as a guest conductor, began performing at the Rialto Theater in New York as assistant to Hugo Riesenfeld, where he began composing and conducting for silent films.