You may upload your originally created audio, and/or music files to which you hold all appropriate permissions and rights.
If you are not sure if you have all the necessary rights, we suggest you visit the following links:
For information about copyrights in your country, try your local copyright office:http://www.wipo.int/directory/en/urls.jsp
For information on copyright laws around the world, try the World Intellectual Property Office database:http://www.wipo.int/wipolex/en/