Just listened to Boungainville again, there is definitely a high pitch instrument used, like a rattle of bottle tops but there is definitely (for me) a high pitched whine that accompanies the chiming (is chiming the right word?) for the last 30 seconds that they are present, it even shows on the eq display, is it possible that in the making process that some people just couldn't hear it?

As for our Jade, the volume of her vocals is definitely on an edge, I would imagine that if you have levels on the eq turned up then it would cause distortion in the sound.