target_speaker leaks through brushes
First of all I am using GTKRadiant 1.4 and this is a MP map.
I made a building with music and it is completely surrounded is brushes. When I am on the top of the building or near it the sound leaks through the 'walls'.
I am using target_speaker. I know some people use area portal, but I wasn't sure how to set that up since I lost the area portal URL. If it is an area portal I need, do I surround the hold building or just the door? I set up a brush with areaportal on the door, but no luck.