Hey all, Ok forgive this lame-O question. I am trying to hook up a sound recording and editing program to my mac. The instuctions say to plug the cable from my stereo to the "in line" on my computer? The problem is that I see nothing that says "in line" or "input"? The closest thing I can think of would be the headphone jack, but that's an output? I need to find out how to plug into my sound card so I can transfer sound into my mac from an outside source? If it helps I have a mac G4 Laptop. Any help would really be appreciated! Cheers! EG.