Intelligence and RIAA
 

On May 13, 7:17 pm, Andre Jute wrote:
Patrick Turner wrote:
Andre Jute wrote:
I used to have c8000 vinyl discs, including some old shellac. I sold
the important subcollections and gave the rest away. Vinyl is just too
time-consuming. So much music to listen to, so little time. CDs are a
boon.

Gee, once an LP gets well cleaned when purchased, putting one on to
play takes, what, less than 30 seconds?


I think there is a certain masochism afield among audiophiles.
snip

Or perhaps some people simply like the sound of some LPs.

Intelligence and RIAA
 

Keith G wrote:
"Andre Jute" wrote in message
I think there is a certain masochism afield among audiophiles. Like
Morgan owners, or MG owners, they think that hardship on one's
pleasures is a symptom of manliness. I don't. I always preferred
Porsche. cars that worked and offered a modicum of comfort, and big-
engined fast tourers rather than harsh, loud sports cars. Same in my
sound systems.


You do? I saw some rather good pix you posted recently and a couple of
your bike with a *heartrate monitor* (?) did I not?

I gave up the car altogether about 1990 and took up bicycling instead.
Now I'm 91.5kg, not too far over the days when I was a rugby player,
and officially certified to have "the heart of an ox". The heartrate
monitor is to keep my heart beating in the aerobic regions; when the
HRM beeps those who cycle with me know to slow down.

More about my bikes at
http://members.lycos.co.uk/fiultra/B...20CYCLING.html

Here's a picture of my current bike:

http://www.apah69.dsl.pipex.com/mybi...%20GSX1400.jpg

Uh-huh. An overage hooligan -- says Andre who is still an honorary
president of the Johannesburg Hell's Angels. (It cost me a
containerload of beer but was cheap at the price because it also saved
me a beating. How the hell was I to know that the guy whose
policeman's hat I lifted was an Angel?)

It allows me to do 0 to *very naughty* whenever I can or want without
even breaking a sweat!! ;-)

Sweat is precisely the point. 91.5Kg...

I define what I want the sound to be and to do, and
then put it together like that. That is why I think horns and panels
are important, and ultra-simple amplifiers

OK, we are back on the same track again.....

All is good, all is calm....

I'm so fit that, when people bother me, my blood pressure goes *down*.

Andre Jute
"You don't need global feedback to build a good-sounding amplifier."
-- Henry Pasternack

Intelligence and RIAA
 

Gerry wrote:
On May 13, 6:33 pm, Andre Jute wrote:
Seeing all the posts about RIAA filters, I can only say I hope none of
the participants passed on the gene of obsessive shortsightedness that
draws audiophiles into the wastelands of RIAA. Vinyl discs are bad
enough when good clean CD's are available, but RIAA is a bodge to
correct another bodge. Two bodges don't make it right.

Andre Jute
uses only CD and so has time for more music

What the hell is "bodge"????

I think John Byrns has already given the American as "kludge".

Though I seem to recall that I first heard the word "bodge" used by
one of my mechanics at Talladega when I was young and reckless enough
to ask "Why?" It turned out there was a man called Bodger, though I
want to stress immediately that I never met him, just in case he turns
out to be a street myth.

My own bodger, kept in my hot rod toolchest (I used to hotrod old
Bentleys), was given to me by an American mechanic. It is a First
World War British Army knife. The bodger part is the fold-out bayonet.
These knives were once seen in every mechanic's toolbox. A common
American version with the younger mechanics, until they had the money
to buy the British Army knife, was tire iron ground round and to a
spiky point at one end.

HTH.

Andre Jute
Impedance is futile, you will be simulated into the triode of the
Borg. -- Robert Casey

Intelligence and RIAA
 

George M. Middius wrote:
Gerry said:

RIAA is a bodge to correct another bodge.

What the hell is "bodge"????

It's obviously some bit of Brit slang. I've never heard it before but
the meaning is plain.

My suggestion is to find a 12-year-old child who earns a B average in
school and ask the child to clue you in.
--

Krooscience: The antidote to education, experience, and excellence.

I can glance up at about 16 shelf-feet of computer manuals still in
shrinkwrap. When a new programme arrives, I put the manuals on the
shelf and give the discs to a teenager and tell him to come back in a
week and tell me how it works. Never fails. Also works for
televisions, DVD recorders and all kinds of electronics that, even if
you have the time to fartarse around with the instructions, require an
intimate understanding of Japlish as translated from Korean via
Chinese by a dyslexic.

Andre Jute
The trouble with most people is not what they don't know, but what
they know for certain that isn't true. ---Mark Twain

Intelligence and RIAA
 

In article ,
Eiron wrote:

John Byrns wrote:

In article ,
Eiron wrote:

You have that graph upside down. HF is boosted for disc cutting
and reduced on playback to reduce noise (among other reasons).


No, I have the graph exactly the correct way around. The RIAA disk
cutting curve reduces the high frequency groove amplitude by roughly 12
dB using a shelving equalizer with time constants of 318.3 usec. and 75
usec. You are the one that has his RIAA groove amplitude graph upside
down, I suggest doing a little homework before making further comment so
as not to embarrass yourself in public.

I suggest doing a little homework before making further comment
so as not to embarrass yourself even more in public.
And just to get you started:
http://en.wikipedia.org/wiki/RIAA_equalization


It is always best to read the Wikipedia with a jaundiced eye. In this
case they have omitted an explanation of some of their unstated
assumptions. The first two paragraphs are OK, but the graph and the
following paragraphs can't be correctly interpreted without
understanding the assumptions made by the Wikipedia article. The
primary problem is that the article fails to mention that they are
assuming a velocity responsive pickup that gives an output that rises at
6 dB/octave with increasing frequency, for a constant recorded groove
amplitude. If you compensate the playback curve graph shown in the
Wikipedia article for this effect you will end up with a playback curve
that is exactly the complement of the recording curve I described, where
in playback the groove amplitude must be compensated by boosting the
high frequencies by approximately 12 dB.

I know from past discussions here that the nature of the groove
amplitude cut on an RIAA equalized LP is a difficult concept for most in
this group to get their minds around, but if you drop your prejudices,
and take some time to do your homework as I suggested, understanding can
be achieved.


Regards,

John Byrns

--
Surf my web pages at, http://fmamradios.com/

Intelligence and RIAA
 

Don Pearce wrote:

That's all very interesting for the etymology of the word, but the
meaning in context here is to do a job by some other means than the
official one - without any sort of judgement as to how good the result
is.

Rubbish! I used the word at the start of this thread precisely to mean
that the official way, RIAA compensation, is a bodge to fix a
recording bodge; both are the official methods of a venerable
institution. A tech near you offers remedial English courses, Pearce;
you might profit by them.

Botch is another thing entirely. You could be doing the job
exactly as recommended, but if you do it poorly, you have botched it.

That's more like it.

d

Andre Jute
Our legislators managed to criminalize fox-hunting and smoking; when
they will get off their collective fat backside and criminalize
negative feedback? It is clearly consumed only by thickoes.

Intelligence and RIAA
 

Andre Jute wrote:


Uh-huh. An overage hooligan -- says Andre who is still an honorary
president of the Johannesburg Hell's Angels. (It cost me a
containerload of beer but was cheap at the price because it also saved
me a beating. How the hell was I to know that the guy whose
policeman's hat I lifted was an Angel?)



Now that I very much doubt, I can imagine the beer saving you from a
beating, but I can see it providing you any membership rights.

Care to show us a picture of your rockers?

--
Nick

Intelligence and RIAA
 

Laurence Payne wrote:
On Mon, 14 May 2007 12:04:28 +0100, "Keith G"
wrote:

No, that's Wrongipedia for 'botch' - bodge means making chair legs or
summat. See:

In the usage I know, "botch" is pejorative, it implies making a mess
of the job. "Bodge" is more neutral. "It's a bodge, but it's held up
very well." cf "Jury-rigged".

The woodworking derivation is interesting, but doesn't prove much :-)

Laurence has got it spot on. A bodger might be used to line up two
intransigent holes so components can be bolted together.

Andre Jute
Visit Jute on Amps at http://members.lycos.co.uk/fiultra/
"wonderfully well written and reasoned information
for the tube audio constructor"
John Broskie TubeCAD & GlassWare
"an unbelievably comprehensive web site
containing vital gems of wisdom"
Stuart Perry Hi-Fi News & Record Review

Intelligence and RIAA
 

"Andre Jute" wrote in message
oups.com...

Keith G wrote:
"Andre Jute" wrote in message
I think there is a certain masochism afield among audiophiles. Like
Morgan owners, or MG owners, they think that hardship on one's
pleasures is a symptom of manliness. I don't. I always preferred
Porsche. cars that worked and offered a modicum of comfort, and
big-
engined fast tourers rather than harsh, loud sports cars. Same in
my
sound systems.


You do? I saw some rather good pix you posted recently and a couple
of
your bike with a *heartrate monitor* (?) did I not?

I gave up the car altogether about 1990 and took up bicycling instead.
Now I'm 91.5kg, not too far over the days when I was a rugby player,
and officially certified to have "the heart of an ox".


I've only got the dick of an ox... :-)

Intelligence and RIAA
 

"Andre Jute" wrote in message
oups.com...

George M. Middius wrote:
Gerry said:

RIAA is a bodge to correct another bodge.

What the hell is "bodge"????

It's obviously some bit of Brit slang. I've never heard it before but
the meaning is plain.

My suggestion is to find a 12-year-old child who earns a B average in
school and ask the child to clue you in.
--

Krooscience: The antidote to education, experience, and excellence.

I can glance up at about 16 shelf-feet of computer manuals still in
shrinkwrap.


*ding*