I'm not sure if it's been discussed before but are all the HDMI inputs on receivers identical, even though they are labelled differently, hdmi1-bluray, hdmi2-dvd, hdmi3-mediaplayer for example?. I'm using the Denon x4000 and the reason I ask is that unless I'm imagining things which wouldn't be the first time it seems the sound on the hdmi bluray port is brighter for lack of better word then the hdmi mediaplayer port even though the receiver settings appear to be the same across. For movies the sound is fine but with pcm stereo music using the bluray port, it's ear shredding bright, I mean it gives me an ear ache after 10 minutes but with the mediaplayer port it sounds o.k. I never thought there was any difference between ports, the labelling was just there for convenience but I'm not so sure now.
[update: I did some further testing just now and couldn't hear any difference between the bluray hdmi and mediaplayer hdmi ports, they both sounded overly bright and fatiguing when playing stereo music so I'm not sure what was different about the other night. Maybe this receiver benefits a lot from a few hours warm up. That's about the only thing I can think of.]