Intelligence and RIAA/cycling and fitness.
 

In article ,
Patrick Turner wrote:

When you get lean and fit, the natural heart rate at rest will fall from
a common 64BPM down to
say 52BPM even if you are 60 like me. A young bloke of 25 who did the
exercize I take would
benefit even more greatly, and have a HR maybe 45.
When I was fit when 40, my HR was 47BPM.

But how do you tell time properly if your resting heart rate isn't a
nice 60 BPM? Also notice that 60 neatly factors into 2*2*3*5.


Regards,

John Byrns

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

Intelligence and RIAA
 

On May 14, 10:21 am, John Byrns wrote:

No, you have that exactly backwards, the RIAA recording curve reduces
the groove amplitude at high frequencies, requiring a complimentary high
frequency boost in playback, which increases the effects of surface
noise.

From: RIAA Equalization Curve for Phonograph Records
By: Don Hoglund

http://www.graniteaudio.com/page5.html

However, because the cutter head's movements translate the amplitude
swings of the original signal into velocity - the rate at which the
stylus moves during its swings - low-frequency signals would be
recorded with a much larger swing than high-frequency signals of the
same original amplitude. So, the low frequency grooves would be much
wider than the grooves on an equalized disk. Wider grooves take up
more room which reduces the available recording time. They are also
much harder for the cartridge to track which increases distortion.
***The solution is to reduce the amplitude of low frequencies during
disk cutting and then boost them with a reverse curve during playback.
***

Another problem is distortion and signal-to-noise ratios in the high
frequencies. Early disc recording equipment did not have the extended
high frequency capabilities of today's modern equipment. However, as
disk cutters improved during the 1940's through the 1960's the need to
address the high frequencies increased.*** The solution was to boost
the high frequencies during cutting and then reduce them during
playback.*** Now there was a high and low curve with a "knee"
frequency.

Asterisks are mine.

The two curves superimposed at the end of the article are interesting.
*Boosted* on recording. *Reduced* on playback.

Peter Wieck
Wyncote, PA

Intelligence and RIAA
 

John Byrns wrote:
In article .com,
Andre Jute wrote:

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.

Did the wife also give up the car, or does she still use it?

My wife is one of those people who resist driving. I bought her a nice
new Volvo estate when our son was born but, since I work at home, I
was always available to drive her. When we came to Ireland over a
quarter-century ago, we could bring only one car taxfree. I would have
had to pay an enormous amount of import duty for my Citroen SM (a
grand tourer with a Maserati engine and hydraulic suspension, both
impossible to service here back then) and so chose to bring the new,
virtually unused Volvo; I breathed on the Volvo engine and suspension
to make it suitable for enthusiastic driving. But we live in a village
because I wanted my son to have the same sort of country upbringing I
had. We walk to the shops and the shopkeepers deliver and carry the
parcels into the kitchen; our son walked to a school less than five
minutes away. People tend to come to me when they want me, or to pick
me up and drive me to social occasions, because otherwise I don't go,
so in about fifteen years the Volvo was used about 30k miles, mainly
for going to the UK or the Continent or driving visitors around
Ireland; every time I wanted to use it, I had to fit a new battery
because it was used so infrequently. It was like new when I sold it.
It's probably amazing to you but I don't miss the car; I just don't
lead a car-based life.

Andre Jute
Greener than thou

Intelligence and RIAA/cycling and fitness.
 

"Patrick Turner" wrote in message
...


Peter Wieck wrote:

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,

Hmmm.... that would be just under 202 pounds, figure at about
5'-9" (1.75 meters) = BMI of 29.8.... Using metric numbers, a BMI of
29.9. Obese is 30.

I'm 1.872M x 77Kg, which gives bmi = 21.948, and about the same as i was
when 25.
but last year in July I was 95Kg, and bmi = 27, and I considered myself
overweight.

Between last July and January, I rode about 200km a week, or about
5,000km,
and my weight reduced from 95Kg to 77Kg and probably I lost 20Kg of fat,
about the weight of a seriously good monoblok tube amp,
or the equivalent of at least 5 x 4Litre cans of olive oil, and put on
about 2 Kg of muscle
which keeps me riding as fast as guys 30 years younger.
At one stage my daily weight records showed I lost Kgm a week.
I amused myself when I stalled trying to ride up some hills last July.
The riding is not a leisurely activity just to take in the sights and
sounds of nature,
but a form of self inflicted pain which is excruciatingly enjoyable,
especially when riding up steep long hills with elevated heart rates,
or pushing hard along a flat stretch to catch some dude way out in the
distance,
or to hang on behind the 30 year old.

If you ride real slow, say no faster than you'd jog, you get a sore arse
and get bored, and the energy consumption
is less than walking, good for you, but not nearly as good if you
elevate the heart rate
for 3 hours straight and could barely talk to anyone if they were
present.
But not all the time, not while going down hill.
At a sweat inducing level, especially on a freezing cold day, one can
burn huge amounts of fats.
So best value from cycling is in the winter time, and because snow is so
very rare here,
the cold cloudless skies of about now to September seem to have been
designed by God for cyclist
pleasure.

Even at my age perhaps i burn 600cals per hour and so a 4 hr ride uses
2,400 cals,
or about the same amount as I use in a 24hr day of sedentary life.
This equals about 200gms of fat, so 8 hrs a week uses 400gms of fat
if you still eat the same as when sedentary.

So the bicycle can create a calorie deficit.
The only way I could lose weight easily without feeling hungry all the
time
was to cycle, and switch my diet to a big salad each day and a reduction
of meat and fat and carbohydrates to a minimum.
I completely gave up bread for the 6mths after July.
Processed food is the very worst crap you can ever eat, so i don't, and
if everyone was like me
and couldn't be fooled easily, the whole food producing industry of the
world
would go stone motherless broke.
The excess food that would then be available as natural
produce from US and Oz farmers could then feed the rest of the hungry
world
with ease.

When you get lean and fit, the natural heart rate at rest will fall from
a common 64BPM down to
say 52BPM even if you are 60 like me.



60 eh? - I'm 60 *tomorrow*!! :-)



A young bloke of 25 who did the
exercize I take would
benefit even more greatly, and have a HR maybe 45.
When I was fit when 40, my HR was 47BPM.
Of course when you exercize, the body rebels to the torture, and becomes
more efficient about
processing the food, so a little food goes a long way, so you won't lose
weight if you exercize and
eat a pile of crappy fat rich garbage afterwards.
I like cabage based salads, 4 apples a day, maybe two bananas and an
orange,
a large serve of cooked oats and yogurt for breakfast; forget about ham,
bacon, sausages,
soft drinks, cheeses, white breads, butter margerine, and all that crap
in plastic packets
with lots of numbers on the label which mean its riddled with dangerous
chemicals to make you feel hungry, and eat more.
protein comes from eggs, and lean meat and fish, which I cannot get
enough of
because what is now beiong sold as fish is often not fish, or its really
crappy,
because mankind has cleaned out the world's oceans of fish.
So I feel guilty eating fish from the sea, not to mention its 5 times
the price
of lean bargain meats selling for $7 a Kg, enough to last me a week.
I do use some olive oil. Its good for anyone, and better than the fats
which I won't eat, and trim off the meat
before I cook it. Animal fat is also where a lot of pesticide and
hormone residues end up,
so don't eat fats. You don't need them and we didn't evolve to survive
off fats.
I never buy deep fried chips, or drink coka cola, its all crap.

Nathan Pritikin said in his book about nutrition for runners that all
you need is
to eat so that 80% of the energy comes from complex carbohydrates,
10% from proteins, and 10% from fats.

Since most UNREFINED grains or breads made with real wholemeal flour has
the whole goodness kept in, not pulled out to get greed driven sales
elsewhere,
then it has the 20% of protien and fat you need, and the CH slow burning
energy.
But even most wholemeal wheat breads are now using rapid yeasts and
chemicals and
I don't eat that anymore, and buy rye natural breads instead, and only
need a
couple of slices a day.


People in the US, UK and Oz are rapidly assuming pig like proportions.


When I am at the supermarket, I am appalled at the fat arse queus lining
up with
trolleys full of crap.
Probably they suffer affluenza, the dysfunctional syndrome of living too
high
and being anxious about everything, so they ain't fit, don't relate
well, and don't ****,
and feed their mouth instead.


I continue to ride about 150km a week and weight has stabilised,
and bmi appears to be a lot better in the mirror.
I treat myself to the occasional 100gm bar of Lindt 70% cocoa choclate.
Its ****ing divine this stuff.
Its much better than buying a 600gram milk chocolate bar with less cocoa
and piled high with fats and sugar,
and chemicals to make you buy more, along with hydrogenated fats to give
long shelf life,
but which are really terrible for your heart.
There are attempts to ban what they are putting into foods now, and as
fast as the banners get stuff
banned, the chemists with no conscience dream up new chemicals.

If I have done 100km on a saturday, I will treat myself to a large serve
of Bavarian Apple from Pancake Parlour, with ice cream and cream,
and unlike a couple of fat guys who play chess while I am there, I don't
have diabetes, and
have earned the treat, which won't hurt me.
These fatsos don't do anything except sit around, and they are paying
the price.

Too much sitting on me arse chatting on news groups and typing up
website
pages and doing electronics had made me heavy.
Now when i have to go into a computer shop there are all these young
dudes and they all look a bit crook,
a bit overweight, and kinda grey, like their PCs have sucked the very
life out of them.

I played Rugby Union when at school, and frankly it was guys just
tumbling over each other,
and I went home sore and sorry after most games. Lord knows how many
unseen injuries meant trouble later in life. Cycling is much better,
unless you fall off, but even if you do, you recover so fast it matters
not.
Cycling has speed, exhilaration, changing scenery, weather, varied
circumstances,
and needs alertness, rapid reflexes, careful judgements, and you learn
lessons
about life.

I am really lucky that there are hundreds of Km of cycling paths here to
ride on,
and that don't include the mountain trails through the bush for which a
mountain bike becomes sensible.
Mountain biking is about getting hot riding up steep climbs slowly, and
descending
with care and putting up with a far rougher ride than on the road.
Modern bikes have suspension and are useable by folks like me over 50
without
enduring injuries.

And even though Canberra has 330,000 people I only have to ride 4Km and
I am
in the middle of sheep paddocks and horse paddocks, and big wide country
areas.
It ain't like London or NY, or Sydney.


If one calculates based on the "average" that individuals undercount
their weight by ~5 pounds, or 2kg, it is obese. In McCoy's case,
using only 2kg is generous given its love of the truth.

No wonder nothing but shadow-pictures, and claims of great height (but
only while riding).

Rugby player...

Peter Wieck

So how do you stay fit Peter?



He probably lost a couple of hundred calories scrolling through this post!!
:-)

Intelligence and RIAA
 

On May 15, 11:17 am, Andre Jute wrote:

People tend to come to me when they want me,

That explains a great deal of your behavior here.

Peter Wieck
Wyncote, PA

Intelligence and RIAA
 

Gerry wrote:

On May 14, 4:42 pm, George M. Middius cmndr _ george @ comcast .
net 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.
It was not 'obvious' at all.

Yes it was.

No - it was not. It's an archaic word not used on a regular basis in
America. Webster's 1956 Dictionary describes bodge as an obsolete
version of the word botch.


You American's keep forgetting that the USA is only a small part of the
world. The word 'bodge' is in common parlance throughout the British
Commonwealth which is just a tad bigger than the USA.

IAn

Intelligence and RIAA
 

In article . com,
Peter Wieck wrote:

On May 14, 10:21 am, John Byrns wrote:

No, you have that exactly backwards, the RIAA recording curve reduces
the groove amplitude at high frequencies, requiring a complimentary high
frequency boost in playback, which increases the effects of surface
noise.

From: RIAA Equalization Curve for Phonograph Records
By: Don Hoglund

http://www.graniteaudio.com/page5.html

Peter, that URL is dead, it doesn't work! That aside, it isn't clear
what the point of your post is? Are you trying to say that my statement
which you have quote above is wrong? If that is so just spit it out and
tell me exactly what I said that is factually wrong?

However, because the cutter head's movements translate the amplitude
swings of the original signal into velocity -

This is not true, at least historically. IIRC in the early days of
electrical recording the cutters were constant amplitude below the
"turnover" frequency and constant amplitude above the "turnover"
frequency. This response was a result of carefully damped resonances
which were inherent in the design of the cutter head. Early stereo disc
cutters had a response which looked like a mountain peak with a
resonance in the middle of the audio band. Aassuming these curves were
velocity referenced, this would again imply constant amplitude operation
in the area to the left of the mountain peak. I have no knowledge of
the response of contemporary disc cutters, perhaps Iain could chime in
here, but I would be very surprised if their response was anything near
the perfect velocity response you assume. As a result of all this the
electrical equalizers used in disc cutting produce a curve that looks
nothing like the RIAA recording curve commonly presented on web sites,
as they must compensate for the mechanical effects of the cutter head.

You have also failed to consider the old crystal cutter heads that were
used in home disc cutting setups, as well as in some semipro equipment.
Even an ideal cutter head of this type would not produce a constant
velocity recording from a constant amplitude input signal.

the rate at which the
stylus moves during its swings - low-frequency signals would be
recorded with a much larger swing than high-frequency signals of the
same original amplitude. So, the low frequency grooves would be much
wider than the grooves on an equalized disk.


This is only because you have chosen to take a velocity centric
perspective, if you took the more natural groove amplitude view, you
would see that the low frequency grooves would be no wider than high
frequency grooves, and that in fact the amplitude of the high frequency
grooves would have to be reduced, as they are in discs cut to the RIAA
curve by some 12 dB, in order to prevent excessive groove velocity from
occurring at high frequencies. Grooves cut with excessive velocity are
difficult for playback pickups to track without creating excessive
distortion.

The high frequency amplitude cut incorporated into the RIAA recording
curve necessitates that a complimentary high frequency boost be
incorporated into the playback curve. This high frequency boost during
playback decreases the signal to noise ratio of the LP by emphasizing
the high frequency surface noise by some 12 dB.

Peter, don't be one of the sheep, take a moment and think for yourself
for once. If you can't do that at least make it clear what the point of
your post was and tell me specifically what part of my previous post it
is that you take issue with?


Regards,

John Byrns

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

Intelligence and RIAA
 

In article . com,
Andre Jute wrote:

John Byrns wrote:
In article .com,
Andre Jute wrote:

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.

Did the wife also give up the car, or does she still use it?

My wife is one of those people who resist driving. I bought her a nice
new Volvo estate when our son was born but, since I work at home, I
was always available to drive her. When we came to Ireland over a
quarter-century ago, we could bring only one car taxfree. I would have
had to pay an enormous amount of import duty for my Citroen SM (a
grand tourer with a Maserati engine and hydraulic suspension, both
impossible to service here back then) and so chose to bring the new,
virtually unused Volvo; I breathed on the Volvo engine and suspension
to make it suitable for enthusiastic driving. But we live in a village
because I wanted my son to have the same sort of country upbringing I
had. We walk to the shops and the shopkeepers deliver and carry the
parcels into the kitchen; our son walked to a school less than five
minutes away. People tend to come to me when they want me, or to pick
me up and drive me to social occasions, because otherwise I don't go,
so in about fifteen years the Volvo was used about 30k miles, mainly
for going to the UK or the Continent or driving visitors around
Ireland; every time I wanted to use it, I had to fit a new battery
because it was used so infrequently. It was like new when I sold it.
It's probably amazing to you but I don't miss the car; I just don't
lead a car-based life.

Not amazing at all, in my ideal world cars would not be necessary for
day to day transportation, cars would essentially be toys reserved for
sport and pleasure, sort of like the horses that preceded them into
transportation history. Unfortunately we still have a very lot of work
to do before we will have a workable mass transit system here in the US.


Regards,

John Byrns

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

Intelligence and RIAA
 

On Tue, 15 May 2007 16:52:53 GMT, John Byrns
wrote:

In article . com,
Peter Wieck wrote:

On May 14, 10:21 am, John Byrns wrote:

No, you have that exactly backwards, the RIAA recording curve reduces
the groove amplitude at high frequencies, requiring a complimentary high
frequency boost in playback, which increases the effects of surface
noise.

From: RIAA Equalization Curve for Phonograph Records
By: Don Hoglund

http://www.graniteaudio.com/page5.html

Peter, that URL is dead, it doesn't work! That aside, it isn't clear
what the point of your post is? Are you trying to say that my statement
which you have quote above is wrong? If that is so just spit it out and
tell me exactly what I said that is factually wrong?

However, because the cutter head's movements translate the amplitude
swings of the original signal into velocity -

This is not true, at least historically. IIRC in the early days of
electrical recording the cutters were constant amplitude below the
"turnover" frequency and constant amplitude above the "turnover"
frequency. This response was a result of carefully damped resonances
which were inherent in the design of the cutter head. Early stereo disc
cutters had a response which looked like a mountain peak with a
resonance in the middle of the audio band. Aassuming these curves were
velocity referenced, this would again imply constant amplitude operation
in the area to the left of the mountain peak. I have no knowledge of
the response of contemporary disc cutters, perhaps Iain could chime in
here, but I would be very surprised if their response was anything near
the perfect velocity response you assume. As a result of all this the
electrical equalizers used in disc cutting produce a curve that looks
nothing like the RIAA recording curve commonly presented on web sites,
as they must compensate for the mechanical effects of the cutter head.

You have also failed to consider the old crystal cutter heads that were
used in home disc cutting setups, as well as in some semipro equipment.
Even an ideal cutter head of this type would not produce a constant
velocity recording from a constant amplitude input signal.

the rate at which the
stylus moves during its swings - low-frequency signals would be
recorded with a much larger swing than high-frequency signals of the
same original amplitude. So, the low frequency grooves would be much
wider than the grooves on an equalized disk.


This is only because you have chosen to take a velocity centric
perspective, if you took the more natural groove amplitude view, you
would see that the low frequency grooves would be no wider than high
frequency grooves, and that in fact the amplitude of the high frequency
grooves would have to be reduced, as they are in discs cut to the RIAA
curve by some 12 dB, in order to prevent excessive groove velocity from
occurring at high frequencies. Grooves cut with excessive velocity are
difficult for playback pickups to track without creating excessive
distortion.

The high frequency amplitude cut incorporated into the RIAA recording
curve necessitates that a complimentary high frequency boost be
incorporated into the playback curve. This high frequency boost during
playback decreases the signal to noise ratio of the LP by emphasizing
the high frequency surface noise by some 12 dB.

Peter, don't be one of the sheep, take a moment and think for yourself
for once. If you can't do that at least make it clear what the point of
your post was and tell me specifically what part of my previous post it
is that you take issue with?


Regards,

John Byrns

John, are you still insisting that RIAA playback requires high
frequency boost? It doesn't. An RIAA phono preamp has a feedback
mechanism that provides high frequency cut. I have designed several
myself, and studied the circuits and operation of many. Had I (and
every other designer on the planet) been getting it wrong all the
time, our systems would be muffled and entirely without top. They are
not; they play back just fine, and certainly for my own, when I play a
white noise track on a test disc (recorded with standard pre-emphasis
before you say anything), I recover noise which is flat within about
1dB from 30Hz to 20kHz.

*Please* go and do some reading so you can back away gracefully from
this ridiculous position you are placing yourself in.

d

--
Pearce Consulting
http://www.pearce.uk.com

Intelligence and RIAA
 

Time for Poopie's p.m. feeding.

You mean windbag.

High-class donkeys don't bray in public, you filthy equine monstrosity.




--

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