The Yin and Yang Planet - Harkotan

I've been wondering this for a while now. If you turned off the music/etc. You would notice this strange distant ominous "beating" all over Shironia or in places with open air / outside on this planet. Is there some in depth lore about this? I sincerely think that the planet itself is alive, and that's its heartbeat. I'd kind of like to believe that the little lady in charge of keeping the balance is the will of the planet as well.

... I never noticed that... but yes actually there is a reason for something like that. I'll, uh, let you finish the story mode for that planet and find out what it is.

This game has a super high attention to detail despite its appearance in graphics.