Hello. I am hoping to improve my car's audio by using a portable DAC/amp with my iPod touch. (I have everything on it as ALAC files.) I was hoping to find a DAC that would allow me to output audio from the lightning port to the DAC, and then the DAC would pass on the USB connection to my car so I could still control tracks via the car's controls, but the DAC would pass the audio to the aux in, which is what I have currently: a lightning cord from car to iPod for control, headphone jack to aux in for audio. Can anyone recommend a DAC that could be inserted into the system? Thanks!