In article , Don Pearce
wrote:
On Thu, 22 May 2008 16:50:38 +0100, Jim Lesurf
wrote:

Just to let people know I've just added some new material to the
'audiomisc' site. :-)


JIm, there is another point you might want to consider, which is that
Shannon's limit applies only to data transmitted over the defined path.
But music in particular is not like that. When we listen to familiar
music it is already stored in our brain and all that is necessary to
trigger it is a very small correlation from the signal; it is a little
like CDMA from this point of view - a clean signal can be recovered from
an apparently impossible signal to noise ratio because the spreading
code is known at both ends of the link, and doesn't not actually get
transmitted and received.

So a familiar tune sunk well into the noise will be heard, while random
notes may be missed.

The above is an interesting point. I may well steal it for a future
article. :-) I do intend (soon) to do the planned article on comparing
the channel information bandwidths of various systems, including ideal LP.
Your point could certainly be added - but of course it applies to any of
the systems, so does not give a specific advantage to any. Although it may
mitigate against the 'poorest' in Shannon terms seeming as 'poor' in terms
of the impression when listening to familiar music.

I know this is not what your article is about, but I think it is
relevant and you never know, may be worth a research grant to quantify
the effect.

Afraid I am long past the days of caring about 'research grants'. I just
toddle along doing what I find interesting and can cobble together. ;-

Slainte,

Jim

--
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