Hello. I have a sony str-de915 receiver, time Warner scientific America explorer 8300 hdc cable box and Toshiba 42rv535u television. When I play sound directly from the time warner box via rca cables it sounds like what I expect. However, since I have several components this is the setup I have. Cable box, ps2, and a Wii plugged into my tv. I tried regular rca cables and a digital out from the tv to my receiver. (I am currently using the digital out, but there was no improvement in sound). The sound is ok if I use just the front speakers. When I try using the surround is where I get a really bad sound. Any ideas?