I am just starting out trying to get a basic, inexpensive recording system on my G3 Mac. I am running OS 8.6, 350 mHz, 256 megs of RAM. I have a Yamaha CD burner with Adaptec Toast software. I just want to record some voice and guitar. I have been told to get a Shure SM57 microphone and plug it directly into my CPU, then use the Free Pro Tools software. Does this sound right? Should I get a mixer or will the free Pro Tools work okay by itself? Any advice anyone can offer would be most appreciated!