Being a EE myself ( although it's been a number of years since I did hands on electronics, it makes sense to me to bypass the crude mixer circuit and merely have a manual switch.
The mixer circuit will actually now mix in any hiss / unclean noise the CD player produces. ( I can't imagine that a crappy radio produces a clean signal )..
Jazzy, maybe you have the answer to this .. Have you placed the CD-OUT line on the scope and observed a near 0db signal ? If there is anything on this line, then I would want to add a manual ( high quality ) switch to bypass this signal.. ( This switch would need to have a very low ohm rating such as not to degrade the signals being sent through it..
Thoughts ???
I am extremely interested in this solution..
However, I will even place an external audio switcher in the cubby ( or elsewhere ) to be able to switch between Sat Radio / iPOD / or other audio source.. Has anyone done this ? I am looking for such an external audio switcher that is has a very small footprint ..
-Fiche