On Wed, 10 Nov 2004 19:12:05 -0000, "Keith G"
wrote:

A while back I made a reference to a woolly memory of something I had read
in HFW to do with Tim de P's views on bitrates and their vinyl equivalents
and said I would post a reference to it, if it ever appeared. Well it's
popped up out of the blue and is, of course, nothing like I remembered it.

It's on 2 pages of the April 2004 edition:

http://www.apah69.dsl.pipex.com/keit.../article01.jpg

plus the top left paragraph he

http://www.apah69.dsl.pipex.com/keit.../article02.jpg


The 'bitrates' are nothing to do with vinyl it seems - simply Tim De P's
idea of a minimum requirements for digital to come even close.

And we're all well aware that 'crazy Tim'is not fully resident on
planet Earth. Typical valvie, on current evidence............

Now, having said all this, I still have another memory that there are some
pretty impressive figures somewhere that compare vinyl 'information flow'
very favourably with digital bitrates, but I've no idea where from and have
no intention of trying to find out.

Commercial vinyl has a dynamic range of 75dB on the best day of its
life, and a bandwidth of less than 20kHz, regardless of what the
cartridge *could* respond to. This may be fully captured by a 13-bit
digital sampling system running at 40k samples/sec, so in fact the
'information density' is significantly less than that of CD.

- I don't need to, I *know* there's more
detail in vinyl played on decent equipment.

Sure you do, dearie, and you've been told just how this *trick* is
done....................
--

Stewart Pinkerton | Music is Art - Audio is Engineering