Here is my dilemma. I am running a 4.0 system as my main listening room. I have a Tate and other 'legacy' surround equipment. The digital side is handled by an old Pioneer DVD player that will play SACD and DVDA discs, purchased when both of those formats were new. DTS also, of course. The Pioneer has the ability in its DAC to down-convert to 4.0 mixing the center channel with the format left/right. Good as for as it goes. But what about the blu ray format? By chance, my main blu ray player in my video room is an Oppo 203, bought new from OPPO in 2018 (better to be lucky than smart). I can swap that into my music system but the OPPO will only do 2.0, 5.1, and 7.1. No way to get surround and the center channel mixed to 4.0. SO what's a 4.0 person to do? Are the stand alone DOCs that will convert to 4.0 instead of 2.0 or 5.1? Help.