Audio resources will help you get started on your search for audio supplements. Copyright laws allow you to use 30 seconds, or 10% of a recorded work, which ever is shorter. If this doesn't fit your needs, check out some of these sites to get music for your multimedia productions. Remember, read the copyright carefully. Royalty free does not necessarily mean free.
The following links were checked last on May 3, 2011. At that time, all links were live and free. If that has changed, please let me know. Also, if you have found a good resource that you think should be added, drop it in the suggestion box, please.