"Stewart Pinkerton" wrote in message
...
On Thu, 11 Nov 2004 21:53:03 -0000, "Keith G"
wrote:


so Tim de P reckons that digital should be 24/400, eh?
Most people can't hear above 20kHz, and 400kHz would allow signals with
frequency content of up to 200kHz be reproduced perfectly. A bit of a
waste, isn't it? Though 200kHz would better capture the harmonics of a
square/triangle wave.

**16/44 digital can't even reproduce a decent 5kHz square wave. Such a
feat is a doddle for a good vinyl system. Do you think you can hear the
difference between a 5kHz square wave and a 5kHz sine wave? Hint: You
probably can.


24-bit resolution would imply a dynamic range of 144dB. That's pretty
loud!


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. - I don't need to,


Vinyl only has (at best) 70 - 78 dB of dynamic range, which equates to
12 - 13 bits resolution, and I am sure vinyl is bandwidth limited as
well
(cuts off at 16kHz?).

**Nope. In fact, a good vinyl recording can go well past 50kHz. The
mighty
Dynavector 10D-II can operate to 60kHz. The square wave performance of
this very fine cartridge is exemplary.


Isn't the extra "frequency content" associated with vinyl a byproduct
of
the mechanical replay system?

**In poor systems, yes. In good systems, no.

In *any* system, definitely yes, since even the mighty Rockport Sirius
III with an Insider cartridge, will still be playing the same tired
old vinyl, which has nothing but noise above 20kHz, despite Trevor's
bull**** claims.



Really!! When did YOU do the tests? or is it just hearsay once again. Back
in those olden days of quadraphonic you needed a cartridge with an upper
range of around 40-45kHz. Mon dieu, the 'humble' Grado Reference cartridge
response is 10Hz - 60kHz and that's not approaching that of an Insider
cartridge! Though I note you don't even mention which Insider cartridge
model in your example so I guess its just hearsay once again - the Insider
Gold cartridge far exceeds the specifications of the Grado Reference as
you'd expect if you knew about hi-end cartridges. Hint, light years away
from any commercial AT cartridge.....

Why should vinyl be bandlimited to 20kHz? there is no real need to, I
suspect its because it suits your own reasoning as CD is bandlimited.
Come on Stewart.. you've only just discovered the way that cutter heads are
cooled ;-)

Iain is sending me some of his recordings. Would you be so kind to send me
an example of your recordings?




OK Mr Wilson, that was rather neatly done - I have to admit that....

Neat perhaps, utter ********, definitely.
--

Stewart Pinkerton | Music is Art - Audio is Engineering