HDMI is a well established standard in the world of displays and connecting, but if you're not getting any audio output, you might an HDMI audio extractor.
The EMX-I-AMP by Hall Research is a 4K HDMI audio extractor with built-in 50 watt audio amplifier for direct connection to 8 ohm speakers. The device provides a separate stereo input for connecting a ...
I have an older Panasonic TC P50ST30 (release review/specs here) that was generously given to be by another Arsian that does have ARC support (I think). The TV sitting in front of an old but nicer ...