I was thinking of adding something else that I had introduced in another, private, early version of the mod.
Basically what it did was randomize a sound, and randomize when the sound played. I had used it for music, so that every minute or two, there was a very soft violin that played, or a gentle drum that faded in and out. The music was taken from The Last of Us and was used in an apocalyptic theme, but there could be other uses, as ambience also uses the same thing in games. I might add that if I update the mod.