I have an issue that has me stumped. I recently bought a LG TV 75UM80 along with a Yamaha sound bar ATS-1080. I am trying to run those through my Denon receiver AVR-S510BT. The sound bar is hooked into the optical port. I have 5:1 speakers (they are ancient Panasonics and will get replaced eventually, but still work). Problem is that I get no audio from the sound bar and only background audio from the other speakers. I'm trying to learn what to do since I am pretty new to this. Nothing I have done with the setup has worked. Anyone have any ideas?