Hi all. I would be grateful for any help offered with my problem of my Panasonic SC-BTT590 one box home cinema. Only got this at Xmas and started using it in earnest after buying the Wife the Harry Potter blu-ray 8 film set. All was great until film number 6 which is when the sound format they are recorded it changed from Dolby Digital to DTS MA. until that point I was able to adjust individual speakers from within the settings to a personal preference with no problems but with the last 3 discs it seems no matter what setting I use I still get full blast full on volume from every speaker, with surrounds drowning out the centre dialogue meaning I have to be sat with remote in hand constantly turning it up and down depending on the scene. I have even tried a setting that looks like it should down convert DTS MA TO DD but it has no effect. Any help before I go crazy please!