We recently bought a 46' LCD widescreen that came with a surround sound system as part of the package. The surround sound system came with a DVD player that all the speakers plugged into. The speakers sound great when playing a DVD, but I was wondering if there was a way to set it up to have surround sound with regular cable TV. I've read the instruction manual front to back and couldn't find anything to solve the problem, which is why I'm asking here. Thanks in advance. TV and DVD player are both LG if that makes a difference.