They couldn't be used if voice chat was enabled (and still can't, from what I've seen), but as long as the room you were in had voice chat turned off the custom music would play.
SON OF A BGUIIUDGSGFG
Kill me now. I've never changed that.
Looks like we learn new levels of dumbness everyday. I'm the lesson of the day with this, but at least, I'm not the only one. There are others who've gone far without knowing. I had to search like I always do, but this time couldn't find it.
I never thought I'd be like that guy.
At first he was like..., but then he was like....
I knew the time would come.