A lot of the music in Rumble World is awful (IMHO), while some of it is really enjoyable. I want to know if there's an official sountrack of it all (that is, a collection of all music of the game and official titles for them all).
Keep in mind that some music files were brought over from the previous games, like Rumble Blast.
Thus if there are some that you are specifically looking for and are not in this list, consider looking in the other link.
Hope this helps!
Rumble/ Rumble Bast OST