Been browsing through here trying to find a solution to my audio intermittently dropping ONLY when playing Call of Duty games. I noticed this when I rented MW3, and now the same issue on Black Ops 2. Some googling told me to un-check everything in my PS3 audio settings except for the Linear 5.1 44.1hz (I think). When I did this, I didn't have the audio drop outs, but it sounded like most everything came from the rear speakers. And when I restarted the PS3, it went back to having everything checked for the Audio settings.
Hooked to a Denon AVR 1312 through HDMI only, using Klipsch 5.1 speaker system.
I don't have this issue with any other games. My receiver screen says MULTI CH IN and the only time I've ever change this on the DENON AVR1312 is when playing Guitar Hero (I changed to MULTI STEREO, it just sounds better). Most everything in the PS3 is set to auto.
Forgive my ignorance on all this, and i'm trying to understand all the PCM/Linear stuff (by browsing this forum, but it's a lot of info)...but anyone else having this problem or have any suggestions? Can (should) I force the PS3 to use a specific setting and should I be at all concerned about that warning message that basically says if I do this wrong I could damage my speakers?