Minor spoiler! Make sure you add the following line to your spooky dungeon outfit.properties:
outfit.music=spooky
Will do. Are there similar lines to add for other scenes?
Still a work in progress but I have beach, holiday,romantic and spooky as the 4 custom musics. I use romantic for the bedroom outfits. There is a default music that is used for all other outfits if unspecified.
I updated the sticky documentation post with more details on how to set the music and customize the undressing sounds