Alr my dudes so first ,
 go to your file explorer
then go to: C:\Users\insertuserhere\AppData\Roaming
go and scroll down until you find a "Godot" file
DELETE IT.
then reopen PNGTuber+ and now, if it still doesn't work just reselect your mic! and now u have your working mic, ready to be used!

My youtube channel:https://www.youtube.com/channel/UC5A3A5jaEmuXgz6NwAVtgLw