I did not realize that the BDP-83 can not decode the DTS-ES soundtrack, but like you said, I would expect the BDP to downmix to 5.1 properly if it could.

I'm aussuming that the BDP can decode a 6.1 BR soundtrack and downmix to 5.1 thru the MCA outs. But since no sound was being output thru the right surround speaker, I'm wondering if the BDP can not do that either.

There are not a lot of 6.1 BRs, but I need to find a few and give them a try.

Thank you for taking the time to try this out on your system. I'm looking forward to the results.

Paul