The owners of music retain their copyrights in the sound recording and work itself. There are a number of restricted acts under the copyright act which prohibit users from using music in certain ways. This includes reproduction, broadcast and public performance. The creators of that musical content deserve to get paid for the use of their music. It should always be the owner of that copyrighted music that makes the decision as to how that music is used, including if they wish to give away that music for free. If you would like to know more check - www.lovemusic.co.nz