yes its something like that
For instance, ur in the hallway and u use the door to go in a room. you put 2 trigger multiples each linked to a target_speaker. This next part is gonna take some imagination. pretend we are looking at it from the side. to the left of the doorway is the hall, to the right is the room. you have the trigger on the left (closest to the hall) linked to a target_speaker that plays the hall music. and the one on the right (closest to the room) linked to the room's music. check the activator box on both target_speakers, and give the triggers a wait of about 2.
So, if ur still with me, when u walk in it triggers both but it will be so fast that you will only hear the last one triggered. This will not work if you have a bunch of people rushing into the room. since it will take 2 sec. to be triggered again.