Apparently, I screwed up whe posting my question. So here it is.
I have a friend running a few music softwares on his first genration iMac. So he's running OS 9.2 and he's not ready yet to switch to OS X or buy a new Mac. Anyway, here's the question he asked me. He's using a Yamaha keyboard and a senquencing software. He would like to record the music generated by his keyboard and burn an audio CD. What's the easiest way for him to do that, since he's already running the computer to control his keyboard?