Audio problem with HT help: volume differences from scene to scene

[evnash]

setup:
PS3 - HDMI - Sony STR-DH720 7.2 receiver - Polk C2S, 70s, Owm3, Bic 12

The problem is that ive noticed big differences in volume during movies. for example there will be a some dialog going on the overall volume would be at my normal level, well then an action scene would come up and i would notice a signification decrease in volume. enough for my wife to ask about it.

i checked the receiver and its isnt overly hot.

noticed it in man of steel last night. also noticed it during the bear fight at the end of the movie Brave. i backed the movie up and sure enough, volume degrease at the same point.

so is this just the audio mix of the movie? or could the sony receiver not be able to keep up with action scenes?

thanks

[HAMP]

Make sure your "D.Range Comp" (Dynamic range compression) is set to 'Off'

[evnash]

UPDATE: I FIXED IT

After more research i found out that the PS3 actually has a "night mode" where is boosts voices during quiet scenes. well we would set our listening level to that then when an action scene came along it would go back to the lower volume setting. this was buried in the PS3 VIDEO settings for some reason. i also saw that the ps3 was set to Linear PCM output instead of bitstream. that made a difference too. everything sounds better now.