My only requirement is to get 6 channel (5.1) digital audio out from USB and output it with a S/PDIF (optical/coaxial) port. So I'll connect the receiver (DAC) and it does the decoding + playback.
I'm looking for an external sound card with a working "S/PDIF out" with Linux for get the above job done.
I assume lot have experiences with using external sound cards with Linux, however there aren't much talking about having experiences with S/PDIF supported external sound card on Linux. So please post your recommendations.