hmm its...fairly calming.
though I dunno, I don't think its so much calming as it is more depressing, you hear this, and you think calm and tranquil until you hear the drums hit every so often, then that makes me think of a kind of a depressing scene of a medieval army starting to invade villages in those slow-mo kinda scene's, where everyone looks frightened as the army starts to burn down the village, but hey maybe thats just me, hell...in fact when I hear this it makes me think of the scene I basically described from Legend of the Dragoon, the old PS1 RPG.