How do I get a sound to play when a door opens? I have a key set on 'soundset' and a value set on 'hugeplat_start.mp3' . It is real, I checked. How do I get it to play?

NOTE: When I try to devmap it, it gives me an error saying it can't find the sound set...

The key "soundset" doesn't ask for a particular mp3 file--it looks for a coded set of them corresponding to start, motion, and stop noises on the door. Go into your assets pk3 and find the sound/ directory. You shoudl find a file called sound.txt in there--extract it and open it up. This is a list of all the soundsets, and the code describing which sound files are associated with each. Do a search through the document for the word door, and you sound find things like impdoor1, door1, med_door1, etc. Enter one of those names under the soundset key.

You can also give func_plats, other func_ entities, and the worldspawn a soundset (for example, the worldspawn could take the soundset "windy" and your map will play ambient wind sounds when in game).