Originally Posted by Big Windy
This whole topic is somewhat pointless because audio is such a subjective thing. Not to mention it has already been discussed in several different places and you should have posted this in one of those threads. Pencil Geek's analysis with pink noise and EQ tweaking was really the only worthwhile contribution that I can recall.
iPod is only going to give you analog audio. You should rip at 320kbps and put them on a flash voyager...
There is nothing necessarily wrong with analog audio. If the BMW DAC is significantly better than the Ipod DAC..or your cables/connectors are crap then it would make a difference.
Otherwise, if the reverse were true, that the Ipod's DAC is superior, you are better off giving your BMW hifi and analog source.