"David Looser" wrote in message
...
"Fed Up Lurker" wrote

But if it is subjectively
discernable then in this day and age it is measurable.

Gosh, something from "Fed Up Lurker" (an entirely inappropriate user name
if ever there was one) that I can agree with!

Admit it, you do find me addictive reading......

It's hard to decipher your long, rambling post, but you appear to be
claiming that there is a measurable and audible difference between
different SPDIF interconnects that isn't simply a matter of bit errors.
SPDIF merely transmits a series of numbers, and as long as those numbers
arrive at the far end unaltered then the transmission is perfect and there
*cannot* be any differences between different interconnects. There's
nothing subjective about numbers!

You're wrong yet again! The subject was toslink and coax, the SPDIF
and CD's 16 binary digits.
Jitter is a timing based error, can be a problem with any feed but with
16bit cd data, as the design flaw with the SPDIF is that it is an unclocked
interface then for that data to transfer bit-for-bit everything else has to
be right. Frequently the in and out interfaces of each device are not an
ideal match, noted by PM was that even if both output and input were
true 75ohm but the interconnect was not, that would result in both
measureable and subjective differences, and vice versa, 50-75-50ohm etc.
There are a whole heap of other factors but you wouldn't understand.


I've recently been experimenting with long distance transmission of SPDIF
over Cat5 cable using RS422 driver and receiver chips. I've been able to
send error-free SPDIF over 200m of this stuff

200m of Cat5 - what were you doing, tapping into a nieghbours ethernet
socket? What has that got to do with CD's 16bit format via the *SPDIF*?

and, as expected, there is absolutely no subjective difference whether the
source player and DAC are directly connected via TOSLINK, or the signal is
diverted via 200m of Cat5.

You haven't quite grasped that toslink is not same as Cat5.
Upload some pictures of your experiment then I'll believe you and will
be able to then tell you what you're doing wrong - I will anyway, the
digital interface of CD, DVD, DAT, DAB etc, dosen't involve Cat5.
The interface of such devices is unclocked for starters.....


David.


You're probably feeling silly now, try and have a stress free weekend.