Leopold Stokowski was, at the time of the film's release, co-conductor of the Philadelphia Orchestra with Eugene Ormandy. Political and artistic differences with the orchestra's board had already led Stokowski to allow Ormandy to assume a greater leadership role at the orchestra and eventually would lead Stokowski to break with the orchestra entirely. This might explain why the city in which the film is set, and by extension Stokowski's "regular" orchestra, is never positively identified in the film. The music was recorded in multi-channel stereophonic sound but released in monaural sound; three years later Stokowski and the Philadelphia Orchestra appeared in the first feature film to be presented in stereo, "Fantasia". Jane Barlow, ballerina and a student of Nijinska, was a body double for Deanna Durbin in this film.