Nothing tells me what it is here. Try the following and try the BD player set to PCM or Stereo as a test run.
I own the Denon AVR-S920W AV receiver. I connected a Sony Blu Ray via HDMI cable to Input 3. Output from receiver to TV also with HDMI. Until yesterday, the connections were fine - I was able to watch Blu Rays and DVDs without problem. Today, I tried to play a Blu Ray disc and although I got a picture, there was no sound. Tried a DVD - same result. Played a cd, Apple TV, iPod and was able to get audio through the speakers, so those are hooked up properly. Played the Blu Ray directly into TV through the HDMI cable without a problem, so it's not the player, the cable, or the TV. The receiver "Mute" is off. "HDMI Audio Out" is set to "AMP" - when I changed it to TV, it passed the audio signal to the TV. I've read and reread the manual several times to no avail and before I spin my wheels with Denon customer support, I thought I'd try here. Thanks a lot