An electronic musical apparatus for use in a music contents distribution processing system which makes it possible to selectively use usage modes such as downloading of music contents from a music contents distributing site to a user terminal (electronic musical apparatus) and streaming of such music contents in a simple manner. A distribution mode designating file indicative of whether music contents are to be distributed from the music contents distributing site in a download mode or a streaming mode is received and interpreted. The music contents received from the music contents distributing site are processed in the download mode or the streaming mode according to the result of the interpretation.