"Arny Krueger" wrote in message ...
"Arny Krueger" wrote in message



Correction:

Per AES preprint 4826, the audibility of jitter varies with the
frequency of the signal being modulated by the jitter. But, their
audibility figures are given in nanoseconds which are 1000 times
greater than picoseconds. The paper suggests strongly that the ear is
most sensitive to jitter as applied to 20 KHz signals. At this point
the threshold of audiblity is about 20,000 ps which is far greater than
110 ps. IOW, 110 ps jitter is nit.

Thanks Arny, I noticed that. I was trying to figure out if at all
jitter was an issue. And , I do agree with you that under DBT I can't
tell the difference in so many things. In fact, at one point I
downgraded myself from High End to Mid End and was enjoying the music
for about a year till last month………..

Okay, now let's ignore about the audible difference and confine to
technical issues because I believe there are some discrepancies in
jitter buster claims.

The measurement of jitter for DAC "X" was between 174ps to 300++ps
between different signals. Can I safely say that the best measurement
the DAC "X" capable of should be 174ps (or slightly less) from a
"perfect" 100% jitter free input?

In that case, let's say a transport with jitter of 20ns clock sends
digital signal without being subjected to any additional jitter (I
know that is impossible) the total DAC's jitter should be around 174ps
+20ps or slightly more. Correct?

We all know clock's jitter of 20ns is almost the best under current
technology and therefore any jitter buster and reclocking device which
is connected before the DAC could only give the best of around 20ps
[or (8ps;3 sigma) – I don't know what's that.- but that is according
some clock's specification].

So the only advantage of using a jitter buster/reducer device is to
benefit a further reduction of maybe 10ps which is too small for any
audible difference. Correct?

However, jitter buster/reducer device also boost the signal. So is it
possible that it is not the jitter but the boosting of the signal
which makes the audible difference?

Thanks.