Just bought one of these cheap for my sons bedroom. The only slight problem with it is that we cant stop sound coming out of the tvs speaker without turning the tv down. Every other home cinema I know doesn't send audio up the HDMI cable but this one does. I can't see why anyone would want sound from their tv speakers when it's coming out of all the other speakers. I can't find anything in the manual or the menu to turn HDMI audio off. Any help appreciated.