Paul is questioning their perception.  His comment exactly does that - read it again.  I am hardly suggesting its news to most people who have spent X on s/cables.  The point I am trying to make is a simple one - science, measurement, listening or other - its all empirical.  If an electrical measurement demonstrates no benefit and a particular human ear hears an emotional content not previously there (to his/her mind) then neither is absolute in both world pictures (was it you who referred to Wittgenstein).  The emotional content may be in the finest signal variations and not due to frequency extension or otherwise.

This whole debate is completely endless due to the empirical nature of our experiences and opinions. The language of each is independent which makes Paul's attempts at absolutism <humour>absolutely</humour> pointless.  Its his absolutism that motivates me to string this out as long as possible - perverse I know.