There is provided an electronic music apparatus that can make effective use of song data by separately controlling external outputting of the song data according to songs while protecting the rights. When song data is selected, the song data is read from a second ROM or a flash memory and written into a RAM together with a copyright flag CRF indicating that the song data has a copyright, when it is set to "1". When an external output instruction is given, when the copyright flag CRF corresponding to the selected song data is set to "0", it is judged that the song data has no copyright to be protected. Then, the song data is output according to the external output instruction. On the other hand, if CRF=1 holds, it is judged that the song data has a copyright to be protected, and then an output inhibition message is displayed to inhibit external outputting of the song data.