[David E. Bath]

In article ,
Audio Empire writes:
On Wed, 16 Feb 2011 01:22:16 -0800, David E. Bath wrote
(in article ):

In article ,
Audio Empire writes:
On Mon, 14 Feb 2011 15:21:22 -0800, ScottW wrote
(in article ):

Nor does it happen in theory. The recording of digital music is just
copying bits.
There is nothing passed from a source to a recording except the bits.
There may be some "noise" in the system along the way but as long as
that noise doesn't change the value of a bit...it's irrelevant and
won't get passed along to the next stage. There is no cumulative
effect and it's very common to be able create bit identical
recreations of massive data files....digital music is no different.

So you're saying that there is no circumstance under which background noise
can get so high that it makes detection of the digital data difficult? Tell
that to people who deal in digital communications.

I was a fiber optic engineer for over 20 years and in the digital RF
field now. The noise issue is handled in the exact same manner as in
CDs and DVDs - error correction. So unless the signal level is so very
weak that the error correction cannot correct all errors, which in the
case of digital communications is extremely weak, these is no loss if
data.



"So unless the signal level is so very weak that the error correction cannot
correct all errors..."

My only point. Thank you Mr. Bath.

But you missed my point when I used "extremely" vs. your "very".
Errors are always fully corrected unless the signal is subsumed by the
noise, a condition that nvers happens except in RF applications when
the signal is either blocked or the distance between the source and
the destination is far beyond the design parameters. In the case of
CDs and DVDs it won't happen unless the player/reader is broken, or
the disc is severely damaged.

--
David Bath - RAHE Co-moderator