I do not know if it might be something I am doing or if my receiver might have problems, but when it is on Dolby Digital, Pro logic, or DTS it is very muffled. At times it is so muffled that you can barley understand the people talking. This is whether you are watching TV or watching a movie on DVD. The most troubling thing about it is when I had the system set up at another house it worked perfectly, but once I have finally set it up in my new home, it seems to be having issues. Thank you for any kind of help!