Free CD-Quality Music

Scaife writes "I make a video project for school each year, and this year we want to produce it on DVD and sell it. The only catch is that we don't have the time or money to get copyright permissions for the 100+ songs we use for it. I'm wondering if there is a large repository of CD-quality royalty-free music somewhere. Whenever I try and take one of the royalty-free MP3s available on the web and use it on a DVD, the quality is awful as it pops and hisses. I suppose this is because of the lossy compression. Any ideas?"