4 links
A Beginners Guide to Mixing in GarageBand
oreillynet.com
Covers the basics of how to mix tracks to create a professional sounding combination.
Digital Audio Technology
modrec.com
Explains the basic aspects of recording, processing and reproducing audio in the digital domain.
Recording and Mixing Drums
recordingeq.com
Article explaining microphone selection, placement and equalization. Includes diagrams and notes on using reverb.
The Recording Website: Articles
recordingwebsite.com
A collection of essays offering basic and intermediate advice. Includes projects and information on using a MIDI system.