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Old July 15th 03, 01:28 PM posted to uk.rec.audio
Jim H
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Posts: 129
Default Why do SACDs sound better? (Soft troll)


That's not to say analogue is ideal, there's a trade off between
analogue accuracy and digital precision.


I'm afraid those are only words without an explanation.


Expanation:

Contrary to popular belief the terms 'acuracy' and 'precision' are not
synonyms.

A digital signal may have perfect pcecision, that is, what is
transmitted/pressed is exactly what arrives. however that signal is only
accurate to a certain degree. In the example of cd audio, an atomic sound
is the nearest of about 65,000 options for that 1/44,000 of a second.

Now, for an analogue signal, the accuracy is perfect, the sound isn't said
to be 'to the nearest x'. I suppose you could argue that a record is 'to
the nearest atom of vinyl' but accuracy on that level is pretty much
irrelevent because an analogue copy is never totally precise - what is
transmitted or pressed will not be exactly the same as the original and
with every copy the errors get worse.

Digital = perfect precision, limited accuracy.
Analogue = limited precision, perfect accuracy.

That's the tradeoff!

NB: I'm not saying anything about the superiority of the sound of either
format here.

--
Jim