Hi my suggestion is, that player can upload custom sounds and import them into there game. I think this would be could a good idea as the current radio sounds are boring after a while, and do not represent my local services one as I am playing realistically. I would also like custom alarm sounds so you can have what you want. I also think you should be able to upload them like graphics packs, but sound packs so other users can use them.
Let me know your opinion!
Jack