I just found this when Ginyu was asking me for something to check out his new headphones. Baisically it´s an sound that the brain tries to identify, and it gives you "a feeling". This one for example, makes me happy and tingly (maybe turn down your sound volume a bit):
The next one gives me an uneasy feeling:
Write what you feel while listening to it.
The next one gives me an uneasy feeling:
Write what you feel while listening to it.