How to set mic default=on for a specific room or user?

[info]

 Hello,

Is there a way to configure the microphone and / or the camera to be  
automatically "ON" (activated) for a room, so that all connected users  
have these values set to on by default?  I can't find a way to do  
this.  

This is on 5.0.0 M3

Thank you.

Ed