GarageBand Audio Unit Effects Tutorial

LG writes "The wild popularity of Apple's new music program, GarageBand, has surprisingly not yielded much in the way of instructions or guides (the program does not come with a manual, printed or electronic -- just some simple tutorial PDFs). Thus, there are many cool but totally undocumented features in GarageBand. MacJams.com has recently posted a fairly lengthy tutorial on the built-in Audio Unit effects in GarageBand, including things like delay, filters, compressor, reverb, etc. Hopefully similar documentation will start to pop up."