I want a soundscape to play everywhere but indoors

[barren nexus]

I want a soundscape to play everywhere but indoors and also play other soundscapes outdoors at the same time. Is there a way? Because as far as my knowledge goes the can 0nly be played one soundscape at a time

[hallow verge]

Make a brush or multiple brushes to include the volume of said room, then ctrl + left click to select the multiple brushes, ctrl +t and make it a trigger_multiple. Make an output in the trigger and select your soundscape(s), set it so that OnStartTouch or OnStartTocuhALL, (TEST WHICH ONE YOU NEED) depending on multiplayer. and the action to do is StopSound

if its not clear i will make a demo map you can copy from