There is a truly amazing amount of software, information
and a veritable plethora of artists and tools that one can
access on the Net.  The links below are just a few places
that one can have a real heyday with in the world of digital
music.
http://www.harmony-central.com

http://www.music.indiana.edu/music_resources

http://www.harmony-central.com/Software

http://www.mp3machine.com

http://www.SharewareMusicMachine.com

http://www.hitsquad.com