Help. Please. I have Bose Acoustimass 6 speakers through the Yam amp (they're in so no point b1tching about them now). When I watch DVDs on my Yamaha DVD-S540 player, the sound levels don't seem to be right. The special effects seem to be very loud and if we turn the sound down to an acceptable level, we can't hear the dialog. Is this just a level problem with the centre speaker and do I simply need to turn it up? The amp has an automatic level setting mode that doesn't seem to help. The DVD is connected to the amp via co-axial (component video). Also, I have no idea which mode (sur. standard, sur. enhanced etc.) to watch the DVDs in. Can someone give me a dummy's guide to DTS, Dolby Digital etc?