I have a Marantz 4300 with my Blu Ray player and Sky HD box plugged into it. When I watch something that's Dolby Digital, it sounds great, nice and equal. When I watch something in DTS, the effects seem to be far too loud compared to voices. It's because there are effects coming down the centre speaker, which there shouldn't be, right? There isn't in Dolby D. Does anybody have any ideas? I've fiddled with the settings for over a year!