Hi! I have a question about the audio in/out on a macbook. Ultimately, I'd like to output the audio to both digital (TOSLINK) and analog at the same time. I'd like to hook my macbook up to the tv and sometimes I will listen though the receiver and sometimes I'll listen through the tv. Is it possible to have the line-in/microphone in jack on the macbook output analog sound instead of using it as a line-in? Thanks!