Made a fast test compile to see if the soundscapes work, but unfortunately they don't.
Ever since the halloween update came, the game has been playing random soundscapes instead of the map's own custom soundscapes, which makes the disco useless.
So what does this mean?
I'm removing the disco songs for now to reduce the map file size. They aren't working, so there's no point in keeping them. Hopefully, if Valve actually decides to do something (it's been over 2 months FFS!), I can add the songs back soon.