https://www.videolan.org/
They decode DTS-MA to a lossless MCH PCM signal, play all region discs and have the zoom and slow motion features which I often enjoy using, but which are found in practically no hard wired BD players.
Thus, my pc would need to output the video via HDMI, either to the processor or directly to my TV. But as neither SPDIF nor AES/EBU can transmit lossless MCH audio, the processor would need to have a USB audio input to do so, to be fed from my pc, like this DAC has. https://exasound.com/Products/s88StreamingDAC.aspx
But regardless of brand, design or price it seems that few if any MCH processors have a USB audio input.
https://bryston.com/preamps/sp3/
https://www.audiocontrol.com/home-audio/immersive-av-preamp-processors/maestro-x7/
https://www.mcintoshlabs.com/products/home-theater-processors/MX100 https://nadelectronics.com/product/m17-v2i-surround-sound-preamp-processor/
And even if they did, could perfect syncing and quality of the video and PCM 5.1 audio from the Blu-Ray disk be assured, when played via any of these three Windows players?