I will concede, that if some one can repeatedly, and consistently demonstrate to show that than can detect some difference between two signals that can't be measured, then there may be more to audio reproduction than what has been measured so far.

But the thing is, no one has been able to demonstrate this. There's always big excuses, and complaints about the trial conditions. So until I see proof otherwise, I'm sticking with the current measurements of distortion and noise as what can be heard. And when they're small enough to not be heard, that's good enough.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris