A music supervisor works with motion picture or television producers and directors to recommend what music should go into the soundtrack for the movie or program. Music supervisors often are also tasked with negotiating and acquiring all the necessary licenses for use of the music in the production.

Making Your Own Music: Songwriting Basics
Songwriting is an excellent way to express your thoughts and feelings and to communicate them to your friends and family, even if you have no aspirations of musical fame or fortune.
