issues with Atmos via Oppo 205 decoder using 5.1 analog output
FWIW I have a done a superficial search on this thread but could not find my issue addressed. Apologies if it has already, and a link would be appreciated.
I use my Oppo 205 by connecting its 5.1 analog outputs to a Parasound Halo P7 preamp. I have no pre-pro or AV receiver at all. I rely entirely on the 205's processor for surround sound audio decoding.
Disclaimer: It's been a very long time since I have updated the firmware on my 205. It lives in an HT that has no internet connectivity (no wifi or network connection to the main house, which is 350 feet away), so it makes firmware updates inconvenient. So this issue may very well be solved with a firmware update, but I have not gone to the trouble yet to load it on a thumb drive and walk it out there.
Issue: Center channel clarity suffers and/or there is a bass balance problem in the mix which seem to be associated with newer movies that only have Dolby Atmos as the audio option. One in particular, "Into the Spiderverse" had muted, unclear dialog and extremely heavy, overpowering bass content. Other recent films include "Hellboy" and "Pet Semetary." Both had crackly distortion problems in the center channel that seem to be solved by a power cycle or by simply waiting long enough. This is frustrating because my system normally has superb speech intelligibility and dialog clarity through the center channel.
My question is this: How does the 205 handle decoding/downconverting Dolby Atmos to "regular" DD 5.1/7.1 (or is Atmos supposed to be intrinsically backward compatible with DD?), and assuming updated firmware, can I rely on the 205 to do this very thing reliably for Atmos program material?