Forgive me if this is a newbie question, but I'm trying to get X-Plane setup and working well with P2A (already got everything going with MSFS 2020).  My main annoyance at the moment is I can't get ATIS to go over the same headset that P2A is assigned to - I don't see an option in X-Plane to route radio traffic to a different sound interface, and even when I check the option to have P2A handle ATIS, it still comes out of the main system speakers (along with engine noise).  

Am I missing something on either the X-Plane or P2A configuration fronts, or am I asking the impossible here?

Look at this comment chain, there is a link to a plugin which will disable X-plane ATIS

https://www.avsim.com/forums/topic/524971-how-to-stop-x-plane-atis/