You have to read your manuals carefully for optimal settings (and from your PS3 and from your receiver).
* There are many settings (audio & video) in all these components.
Take your time.
Is your Denon AVR-590 HDMI v.1.3? So it can pass the new high res. audio.
Or do you need to connect your XBox360 from the digital Optical cable for the sound?
Same with your PS3, it is a very complex machine with zillion of settings.
How's your PS3 connected? HDMI?
-> By the way, Welcome to Audioholics forums.
