Get microphone amplitude of remote talker

I’m programming a multiplayer game and need to get the microphone amplitude of the remote talkers in a session to know how loud they’re speaking in voice chat.
I’ve been using the advanced sessions plugin to register the remote talkers when they join session using blueprints, but there is no BP function to extract the microphone amplitude of them, so I think I’ll have to obtain them using C++.
My question is. How would you go about implementing this?