Hey Stickydounut, welcome to the forums 
Music hasn’t really come up yet.
There was initially some music, but that was removed when the game gained some traction, because it didn’t have the correct license
That’s about it So to answer your question, no i don’t think the developers will create it themselves.
Perhaps after release they get enough money to get an artist to make some music for them, or it will be some royalty free music. We don’t know at this time