Yeah, but if you have a receiver with an optical input, more than likely it's able to interpret DD 5.1 . Everything depends on the source, whether your media is putting out a DD signal or a prologic, or std. surround, or whatever. Like sonokyo said, most PS2 games aren't even outputting more than a DPL signal. Anyway, the audio is slightly clearer. About the same as going from s-video to component, IMO.