Originally Posted by kellybob
Notice they said presuming. I think their presumption is wrong.
Presuming is an assumption made from observed behavior which may or may not be accurate due to unreliable or contradictory information, or a failure to confirm the issue with the decoder authority. If OPPO has not heard back from their hardware decoder about this issue, and their internal engineers can't say for certain what the cause is, OPPO will have to infer (presume) what the conditional requirements are to initialize the error.
In this case, if the player is decoding the HDCD information, and the receiving equipment for some reason or another tries to internally decode the already processed signal, you will run into compatibility issues.
The problem is that the only time HDCD is decoded is over the analog outputs.
We already knew, as far back as April 6, that the player is internally expanding HDCD information through the decoder, as referenced in this e-mail from OPPO Digital
"HDCD expansion is done by the decoder chip internally. The audio data sent to the DAC and the HDMI output are already expanded to 20bit and packed in a 24-bit word."