Drakino, I am confused here. Raw bitstream implies that the decoding job is done by the car head unit (Alpine or whatever). Which would be a higher-end solution in terms of audio quality. While line out audio feed implies that the decoding job was done by the ipod, which outputs a simple analog signal. I doubt it can be the case with devices like the Alpine, as the connection to the iPod is merely USB (and so digital, I assume)? Am i right or am I missing something?