I have the same problem. So, I reached out to OPPO to see if the BDP-93 was limited to 96 over HDMI. It is not. They confirmed that the BDP-93 will pass through 192 with no problem. Their feedback was that the SP3 must have a handshake problem that results in the OPPO down-converting to 96.
James, if possible, can your engineers reach out to OPPO to see what the issue is? It would be great to get this fixed with the next firmware update.
Thanks
Hi James, just following up on this, I had never looked at the rates before on the SP3.
I have a much older Oppo 83SE (
still hoping you will build me a replacement Bryston Bluray to replace it eventually 
) anyway, I tried a couple of things, connected up over HDMI if I put a DVD-Audio disc in the SP3 shows 96kHz correctly, so that it is good, I will have to find some 192kHz to try later. So, to my question, I then left the rate display on the SP3 and ran a couple of Blurays, they always report 48kHz regardless of whether it is bitstream or PCM (I have max LPCM set to 192kHz in the oppo) I tried ordinary DVDs, DTS-MA and DD-True HD all the same always 48kHz, does that sound right?
Cheers