Have an XBox One on HDMI, Windows 10 PC with GTX970 on DP.
I get absolutely no sound through the speakers when on either input, but if I plug the headphones into the jack on the back, I'm able to get sound. I've tried turning off and on the X34, unplugging it, using the "Reset" functionality. "DTS" shows as greyed out in the OSD. If I unplug DP, it lets me "Enable" it, but when I plug in DP again, it shows as disabled.
It almost seems like it is not detecting when headphones are unplugged - I feel like I had sound from the speakers when I first set it up yesterday (purchased last week).
Any thoughts? Sucks that in day 2 I don't have speakers.