lol, i don't do any thing fancy AT ALL. wish i could though. i set my speakers on the left, my amp on the right, and my phone in the middle. then i play along with a tune for about 5 secs and do that a few times till the volume sounds reasonable on both sides.
then it comes out like this:
again, i wish i had the resources to do it the way you cats do it, cause that would be a lot cooler.