Voice input API

I'm using Meta horizon worlds desktop editor for my VR Game World:

My main goal: A platform that moves up and down based on the player’s voice loudness. Louder voice = higher platform. Silence = platform stays low. 

And my other goal: when user uses microphone and sings/talks, the game detects that and it triggers something like e.g platform stops moving. 

How would I do this with Meta horizon worlds desktop editor right now? Does a Voice input API exist or could I use Custom input APIs? Could I use a NPC as a middleman to detect the user talking and use that to trigger something? 

THANK YOU!