Just tested a PCM2704-powered sound-card. (only the 3,5mm-Output, but I assume the others work too).
Works very well! The sound is automatically switched to the soundcard.
Even the buttons work. 
Just tested a PCM2704-powered sound-card. (only the 3,5mm-Output, but I assume the others work too).
Works very well! The sound is automatically switched to the soundcard.
Even the buttons work.