Vibe-OnLone - The Mammoth Music Meta-List
From Morris dancing to the San Fransico Symphony. There are sound bites of different music and instruments as well as links to many other sites.
Idiots Guide to Classical Music
You probably recognise more classical music than you think! There are lots of sound bites on this site and a beginners guide to classical music.
History, interviews, audio files, photos and much more.