"Jim Lesurf" wrote in message
...


In the brief test I used two pairs of sample files downloaded from the
Naim website.

So I assume that you don't know how one was produced from the other in
each
case. (I am also assuming the 'pairs' were from the same source
recording.)

Yes, and I also made the same assumption.



IIRC At least one person has analysed versions of such recordings and
shown
that they have measurable differences that aren't due to a change of
sample
rate or sample depth. Instead due to the producers deciding to "not level
compress the 'hi rez' version as much as the 'cd' one" or similar.

Hence in such cases a difference can easily be measured, and may be
audible, but actually tell you nothing about the difference in sample rate
or resolution being a 'cause' for said differences.

I just asked my daughter if she could hear any difference, and then to
explain the difference that she heard.


Her description of the difference made me think that she was hearing a
difference in the bit rate.


This tells you that she thought she heard a difference. But it doesn't
give
you any clue to if there was any difference due to the difference in
sample
rates or bit-depths.

Are the Naim files you refer to available freely? If so I'd be interested
in examining them sometime.


Yes, freely available from http://www.naimlabel.com/

Let us know your thoughts!


--
Michael Chare