Originally Posted by
AL9000
I think it's another effect of psychoacoustics. If you start from scratch and spend an hour or more tuning, you eventually end up with something that sounds good in relation to what you started with (nothing). Once you leave for a while, let your ears rest, and come back to listen to it again, you realize it's not that good overall, it's just better than what you started with.
I heard a guy say one time to only tune 30 minutes to an hour and then take a break for several hours. Once your ears are back to normal, come back and continue for another 1/2 to 1 hour.