http://scienceblogs.com/cortex/2007/09/ ... e_west.php
Here's the take-home message for those disinclined to click:
The main reason I'm sharing this is it's probably the lesson I need to learn most.But before a pattern can be desired by the brain, it must play hard to get. Music only excites us when it makes our auditory cortex struggle to uncover its order. If the music is too obvious, if its patterns are always present, it is annoyingly boring. This is why classical composers introduce the tonic note in the beginning of the song and then studiously avoid it until the end.