I'm thoroughly fed up with having to pick out music and burn CDs that hold at most 20 songs to stuff them in my 12 CD changer deck in the trunk. That was probably cool 5-10 years ago. I was wondering if it would be possible to disconnect the CD changer and hook up an auxiliary wire for MP3 player plugin instead. How exactly does this CD deck work? Is there an analog audio signal coming out of the deck, or is it all digital?