Hello @George_Carlson,
Playing Multichannel/DSD content to the Oppo via Network is not possible at this time, please see this post:
(OPPO UDP-203 and UDP-205 now Roon Ready)
Due to technical limitations within these products, the audio interface available to the RAAT firmware is unable to support DSD or multichannel playback.
OPPO is investigating a path forward, but as of now, we don’t know if or when these limitations will be bypassed.
You would need to connect the Oppo via HDMI or USB to stream multi-channel content.
Thanks,
Noris