Sounds like you already tried the obvious. What about that Sony? Does it have a setting that switches the audio from Optical Audio Out to HDMI Audio Out?

I've had terrible luck with Sony equipment and wouldn't be surprised if the Sony was malfunctioning. You could try another player (if you have one) to check the optical input on the Denon.

I do mind. The Dude minds. This will not stand. This aggression will not stand man.

M60|VP150|QS8