THIS! This was EXACTLY what I've been looking for.
I have a Rodecaster Pro and while I could work around most of the sounds inputs, being able to separate out my mic from my console/roku which was running through TRSS on the board was not working at all. While I could split tracks with ASIO, I only have one actual microphone, so using it with Discord or other apps would carry any other tracks over as well.
But NOW, with this plugin, I can basically output the separate track (mic) to a virtual audio cable using the filter. I have the virtual audio cable being pulled in and rebroadcast via Nvidia Broadcast to remove excess background noise. Then I have NVidia Broadcast as my input device for my mic in all my other programs (Zoom, Discord, etc).
The great thing is that I can have the split track muted in OBS and hidden AND IT STILL WORKS!
So I don't have a ton of clutter in my Audio Mixer.