"Ian Molton" wrote in message
...
Rob wrote:

Why can't you turn this round - instead of asking
him to prove it, you disprove it. Simple hypothesis - test it and see
what happens.

Ok, I'll bite.

will you accept that two identical bitstreams will reproduce identically
through a given DAC?

If so I can disprove andys theory by ripping a CD on my PC at 30ish speed
and comparing the bitstreams.

I've done this before, with some pretty manky CDs, and have successfully
extracted identical bitstreams on two consecutive runs.

I've even done it whilst playing loud music too.

Will that suffice?

Well, it's one test but even it adds support to the 'vibration matters'
hypothesis it wouldn't necessarily explain what's happening. The hypothesis
(antithesis if you like) is that 'metal blocks strapped to CD ROMs affect
sound'. I can think of tempertaure, media - I don't know, gravity,
magnetism, radiation! I just have no idea. My problem with this is a
reaction to the absolute dogma of positivist approaches: 'if it measures,
it's real'.

I have absoltely no technical understanding of the issue. I've read a few
articles and follow Jim Lesurf's contributions with interest. JL is probably
the most qualified to explain things from the
technical/quantitative/positivist viewpoints - and you will note his reply
in this context is slightly equivocal - there is 'wiggle room' - and, IIRC,
he is/has been a user of dedicated transports, although this may have been
to do with DACs, can't remember.

Just one thing - would your test show jitter?

Rob