"Stewart Pinkerton" wrote in message
...
On 26 Oct 2005 02:41:56 GMT, "Iain M Churches"
wrote:

"Stewart Pinkerton" wrote in message
...
On 22 Oct 2005 17:27:18 GMT, "ScottW" wrote:

" wrote in message

extended FR, it all

Could you explain why you think LP cannot exceed CD in this category?

It's seldom denied that it has the *capability*, but it's also a
known fact that the reality is rolloff above 12-15kHz to avoid
overheating cutter heads. MFSL half-speed masters may be the
exception.

Sorry Stewart but what you refer to as a known fact is neither
known or factual, but totally incorrect. Such a statement reveals
your lack of knowledge of practical disc cutting, although it
probably suits your anti-vinyl agenda:-)

Actually, your attitude reveals a refusal to accept general practice,
but suits your valves 'n vinyl agenda.

I accept general practice as you call it, as I am involved as a
professional recording engineer in digital recording almost
every day, while you are.............


We have discussed this matter at great length before.
Helium is used as and when required to cool the cutter-head.
Neumann, Lyrec, Westrex and Decca cutterheads all have an
hf response 22kHz.

But not at full output.

Presumably by "full output" you actually mean "peak level"?

If you mean 22kHz at peak recording level
then of course not! What an absurd statement:-)

Perhaps you would care to find us a musical instrument which,
when playing in balance with an ensemble that can produce
22kHz at peak recording level, and then a piece of music
where this is called for.

The highest note produced by a concert grand piano, C8, is
exceeds the range of any other instrument of the orchestra
at 4.186kHz. So even the 3rd harmonic of this note
is only 12.558kHz and probably some 50dB below the
fundamental.

A bell tree, rich in harmonics, produces a 3rd harmonic of
about 15kHz in approx the same ratio.

Experimentation with the equaliser of a studio console
will demonstrate that the "centre" frequency of a small
rivet cymbal is about 6kHz, with a 3rd harmonic at 18kHz
again some 40dB below the fundamental.

At the low end, once again the concert grand piano
with Ao at 27.5Hz produces a note lower than any other
instrument of the orchestra, with the Eb contrabass
sarrusaphone coming in second place at 32.7Hz.
A five string bass guitar IIRC can manage about 36Hz.
This is basic knowledge learned by musicians and
studio personnel in their first year of study.

No doubt other cutting facilities, EMI CBS etc had
something similar.

No doubt they all produced vinyl with the same fundamental limitations
at both ends of the spectrum.

I am sorry, Stewart, but your claim is false, and
if you had any hands-on experience of practical disc
cutting you would not have made such a statement
in the first place.

Cordially,

Iain Churches