Pimax Crystal Super - No Sound out of DMAS speakers

[Twwhitey]

So I received my Super earlier this week and all seems to be OK however I, for the life of me, cannot get sound to come out of the now installed DMAS speakers... I think this is because the headset itself is not being recognized as an "audio capable display".  

Question for you Super owners out there where things are working... are you seeing (2) distinct options in the windows "Audio Playback Device" options?  I'm ONLY seeing the "Headphones (2- Pimax Crystal Super)" - when I select this, I do indeed get sound out of the headphone jack on the headset when I plug in earbuds, etc..  However I don't get any sound out of the DMAS speakers (which seems to make sense because I've selected the "headphones").  

Should I be seeing ANOTHER Audio Playback device for the headset speakers itself in the list below?  I believe this is the root of my problem but Pimax Support has been.... well...not super helpful so far.

My understanding is that the DMAS speakers are driven through the DisplayPort connection whereas the headphone jack and microphone are driven through the USB connection (both of those appear to function properly) so I'm thinking there's something up with my 5090 and Super not playing well together.  I've done a full DDU and nvidia driver install (latest drivers), I've installed, uninstalled, reinstalled Pimax Play multiple times, tried multiple combinations of USB and DisplayPorts and the Super's firmware was updated to the latest and greatest so I'm running out of ideas.

I'd be interested in hearing from any folks where it's working fine if

1. You see more than one Pimax Crystal Super option in the Playback device selector? (screenshot above)

2. If you see the Pimax Crystal Super in the list of "Audio Capable Devices" in the nvidia digital audio section of the nvidia app.. because I don't (and I have mine plugged into DisplayPort #1 currently)

[Moxica]

Select realtek as playback device in windows. (I take there are ordinary speakers connected to that)
Then you select the Pimax as "Headphones" in DCS "Audio menu"