I would try and use what I have in front of me before spending any more money on a system that is not the main one of the house. You can try it out now for nothing. If it isn't up to snuff, look into a receiver supporting ARC. I believe the TV supports ARC but not eARC. The DAC supports ARC so you can use the HDMI connection from the TV's HDMI/ARC port to the DAC's HDMI/ARC port rather than an optical connection between them if desired. In either case, the TV's audio output setting should be set to PCM, not Passthrough, DD or DTS. The DAC will only handle a two channel PCM signal.