I picked up a Kenwood vr 309 today. Its pretty old and only has a single optical input. My TV is a Sony kdl-46v5100. I would like to run the PS3 to the tv with HDMI then output the DTS/audio to the receiver through the television's optical out. When I do this the receiver is only getting stereo. When I switch the optical directly to the receiver I get DTS. This must be a settings issue? Thanks!