Blindjim
So... IMHO... if you ain't encountering such audible shifting briefly or extensively, either your system lacks sufficient resolve, or your hearing is what has changed for the worse more than anything else.... OR you've simply detached from reality and refuse to accept what your ears are telling you..
The error of this is the assumption of actual audibility.
A perceived difference isn't necessarily due to an actual audible difference.
While it's true that we don't know everything, that doesn't mean we know nothing. And one thing we do know, and have known for quite a long time, is the role that psychology can play with regard to our subjective perceptions.
A fact that is routinely ignored, dismissed out of hand or simply denied by many. And until that ambiguity is adequately controlled for (beyond ego and vanity), then one can't come to any meaningful conclusions.
