Yes the Oppo has 2 HDMI outputs:

1- "Main"
2- "Audio Only"

Yes- I am sending the Main to my projector- via my Radiance video processor. The Audio Only is going right into my HD621. The 203 is decoding the soundtracks to LPCM and sending it out to the HD621.

I believe you are asking about the newer HDMI standard for 4k- is it 2.0 or 2.2? The question is whether the Oppo is using a lower level HDMI standard like 1.4 that would be compatible to the HD621, which would allow the HD621 to work properly- as I understand it the HD621 doesn't work with the 2.0 or 2.2 HDMI or whatever the HDCP version is. Is that what you are asking? I don't know the answer. I think this is a question you might want to pose directly to Oppo.

I can only give you my own guess- my guess is since I'm using the input with HD and not 4K then it is likely using the older HDCP/ HDMI settings, and I would guess the output would contain them.

I wonder if it might be possible to find a device that could strip the EDID info, which might help it work with the HD621.

I would also imagine that someday (soon?) Meridian will have to come out with a HD621 device that works with the newer standards. An editorial comment is as a luxury company, Meridian shouldn't shift the burden of figuring this stuff out to its clients and installers.

http://www.oppodigital.com/blu-ray-udp-203/

{adding to this a little while later}
I poked around their website and this might be of interest:

http://www.oppodigital.com/blu-ray-udp-203/blu-ray-udp-203-Features.aspx
Quote
Dual HDMI Outputs
The player features two HDMI outputs – an HDMI 2.0 port for connecting to the latest UHD TVs, projectors and A/V receivers, and an HDMI 1.4 audio port for connecting to older A/V receivers. Customers with newer 4K- and HDR-capable A/V receivers can use a full HDMI 2.0 signal path, while customers with older A/V receivers can have a split A/V setup.

So it appears if you have a 4K device or HDMI 2.0+ device, and if the output of that device is a format that is newer than what the HD621 can handle, the 203 can also help you by bringing the audio "down" to HDMI 1.4. As an aside it might be worth while to see what you think about the Oppos decoding to LPCM. If memory serves, most DTS MA and Dolby TruHD on Bluray are 48khz- and I think the HD621 can upsample to 96??

I wondered what devices this could cover. Kaleidescape 4K? No it has a 1.4 HDMI out for audio. Apple TV? No, its not 4K yet and is 1.4 also. Roku 4K? It seems that would qualify. Maybe other streaming devices?

Last edited by JerryL; 2017-01-15 18:43.
Best regards,
Jerry
Main System: 861v6, DSP8000s in corners, DSP7000s Center and Sides, 1-9 humans.