Thank you xnor.
I cannot hear any difference (but then my hearing-oops-my age- is well beyond the discerning quality required). Equipment, files stored on PC, played back through Onkyo TX-NR609 via DLNA feeding transmission line speakers. I do not use headphones.
Very interesting responses from the members.
Perhaps nick_charles should continue the Phychology of hearing and perhaps including the phycho-acoustic phenomenon as a new Topic. It would be very interesting.