Hiya all, I (actually my daughter)found this really cool imaging/surround demo on you-tube. Use headphones for best results.
The neat thing is they also explain to some degree how and why we hear what we do when we get our gear working the way we want it to work.
My apologies if this is in the wrong section.
Have fun and make sure you close your eyes!
Chris
http://youtube.com/watch?v=IUDTlvagjJA&feature=related