The 6 analog outs of my fireface uc are connected to a 5.1 speaker system.
Now i would like to additionally feed a surround signal from either a Samsung Frame TV or a PS4 which both have a digital optical outs.
Since the fireface uc can't decode dts/ac3 (and similar) i'll probaly need a hardware decoder between TV/PS4 and Fireface, right?

Is there any unit you could recommend to do this? Or do you suggest another way to feed the surround signal to the fireface uc?