Using NodeRed and a BlackMagic ATEM Video Switcher?

Using NodeRed and a BlackMagic ATEM Video Switcher? I am trying to heads or tails of the BlackMagic ATEM support in NodeRed... there are 3 contributed node packages, and I am using the most recent one, per its github release information...

https://flows.nodered.org/node/blackmagic-atem-nodered

But I am frankly struggling with it, in that I need to get the master audio levels displayed on a dashboard. Yes, I know the dashboard support has changed so I am currently using...

https://dashboard.flowfuse.com/getting-started.html

The actual BlackMagic SDK is way over my head being C++ based, so could really use some help from anyone that has done BMD ATEM integration with NodeRed.