I just bought the RCA RT2390 home theater system. Its my first surround sound system. Im using and optical cable to go from the DVD player to the receiver. I have the DVD input set to optical. I cant get Dolby Digital to work. Dolby Pro Logic II works fine. Also, (not sure if this is a problem) on the display where it has the 6 logos for the speakers, everything is there but the only ones labeled are L and R. The 2 surround, center, and subwoofer are not labeled, but they seem to work fine.
nevermind, I figured it out. I had to go into the setup on the dvd player and change the dolby digital out from lpcm to bitstream. that fixed both problems.