Driver to drive?

[Jan Panteltje]

On a sunny day (Thu, 23 Oct 2008 15:26:18 +0100) it happened Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote in
<4900898A.259B7E20@hotmail.com>:

So you'd be happy with the -3dB @ 20Hz and 20kHz of the 60s and 70s ?

Graham

Below 20 Hz sound is not audible, but you can feel the vibration,
(recently tried that), above 15kHz only the young can hear, above
20kHz only bats I think (and you perhaps), then there is the speaker...
Looked for a nice electrostat few days ago, bit expensive though.
So, if I want hifi I use the Senheiser headphones.
And 3dB is easily corrected with a graphic equaliser no?
Better amps are wasted on me I am afraid.

PS
till how many MHz can YOU hear?

 

[Jim Thompson]

On Thu, 23 Oct 2008 00:58:56 -0700, JosephKK <quiettechblue@yahoo.com>
wrote:

On Tue, 21 Oct 2008 09:44:13 -0700 (PDT), mpm <mpmillard@aol.com
wrote:

On Oct 21, 10:21?am, Richard Henry <pomer...@hotmail.com> wrote:

You don't get arrested for plumbing without a license

Agreed. I was just responding to Terrell's terminology, as he lived
there.
Substitute "citation" or "get a fine" for arrest if you like.
But I don't live or work there, so I really don't know.

-mpm

Perhaps i can clear the air a bit. I have not researched Ohio laws
but there is such a thing as "uniform state laws" mostly. An
organization called "National Committee on Uniform State Laws" formed
under the Constitutional "full faith and credence" law issue between
the states, caused the creation early on. See:

http://www.law.cornell.edu/uniform/uniform.html

Pro-life vs Pro-choice and the alternative marriage issues are driven
by this issue. Thus efforts to decide it nationally. The national
issue effort only trades local variation for global variation, but
adds input from many more cultural points of view.

Here in the US, perhaps we should just kill the extremists and walk
away from fighting about it for a while.

8=(

In trades (and engineering) it is _uniformly_ the rule/regulation/law
that only the "responsible" person needs the license... think P.E. for
example.

I can think of only a few instances where all workers need
(industry-specific) licenses, at least here in AZ... beauticians,
heavy truck drivers, securities salesmen, and certain real estate
agents.

For other jobs I am sure it varies substantially by state.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

"The American Republic will endure until the day Congress
discovers that it can bribe the public with the public's money."

- Alexis de Tocqueville

 

[Vladimir Vassilevsky]

Jan Panteltje wrote:

Below 20 Hz sound is not audible, but you can feel the vibration,
(recently tried that),

Actually, the very low frequencies are only causing problems because of
rattling of everything around. For that matter, it is good to have the
steep highpass filter with Fc ~ 25Hz in the audio path. The very low
boom-boom usually happens at about 30..40Hz; there is little point in
going below that.

above 15kHz only the young can hear, above
20kHz only bats I think (and you perhaps),

The nonlinear mixture of 19 and 20kHz will produce the clearly audible
tone at 1kHz. If you want to be reasonably linear at 15kHz, then the
bandwidth should be extended well beyond the audible range.

then there is the speaker...
Looked for a nice electrostat few days ago, bit expensive though.
So, if I want hifi I use the Senheiser headphones.
And 3dB is easily corrected with a graphic equaliser no?
Better amps are wasted on me I am afraid.

PS
till how many MHz can YOU hear?

Not too long ago I had the ocsillation at full power in the amp with the
frequency about 40kHz. I felt that



Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com

 

[Eeyore]

Vladimir Vassilevsky wrote:

Jan Panteltje wrote:

Below 20 Hz sound is not audible, but you can feel the vibration,
(recently tried that),

Actually, the very low frequencies are only causing problems because of
rattling of everything around. For that matter, it is good to have the
steep highpass filter with Fc ~ 25Hz in the audio path. The very low
boom-boom usually happens at about 30..40Hz; there is little point in
going below that.

Depends. What's the lowest organ pipe note ? Even rock Bass guitar low E is
43Hz IIRC.

above 15kHz only the young can hear, above
20kHz only bats I think (and you perhaps),

The nonlinear mixture of 19 and 20kHz will produce the clearly audible
tone at 1kHz. If you want to be reasonably linear at 15kHz, then the
bandwidth should be extended well beyond the audible range.

No question about it.

Besides, when young, I could 'detect' rather than 'hear' up to 24kHz. And
yes, I could hear bats too.

then there is the speaker...
Looked for a nice electrostat few days ago, bit expensive though.
So, if I want hifi I use the Senheiser headphones.

Or Beyer or AKG.

And 3dB is easily corrected with a graphic equaliser no?

Graphics are crap. It's like trying a crappy way to fix something that's
fundamentally broken.

Graham

 

[Martin Brown]

On Oct 23, 11:21 am, Jasen Betts <ja...@xnet.co.nz> wrote:

On 2008-10-21, Richard The Dreaded Libertarian <n...@example.net> wrote:

a crap picture.
A year ago it used to be 'nearly acceptable' now it's not even nearly.
Constant freezing, blocking out, loss of sound, paint-it-by-numbers colours
and Max Headroom staccatos.
An inbuilt tendency to conspiracy theory has deduced I'm losing bit
bandwidth to that HD thing the broadcasters seem to be pushing. They switch
off analogue in a couple of months, the telly's (and STBs) look like they'll
be heading down the council recycling centre at the same time.

I wonder who voted for that crap,

the decendants of those who chose NTSC before colour TV was mature.

I always believed that Never Twice (the) Same Color (sic) was well
named and that the color instablity was an intrinsic problem with the
modulation technology until I lived in Japan where they correctly
implemented the NTSC specification. Flesh tones of US newscasters
drifting between Addams family green and purple tinges was most
entertaining. The improvement that clamped flesh tones to dead flesh
orange was even funnier.

UK PAL is intrinsically insensitive to the same type of systematic
error by design.

or have we returned to the days of emperors?

I think there's an element who want USA to be First, unfortunatly that
means adopting as standards technology that's soon eclipsed

Strangely though the Japanese had some experimental HD TV broadcasting
in the early 1990's. Mostly on demo screens in the larger store like
Laox. The technology was eclipsed by digital but it was cute in its
day. Lots of Japanese hitech toys do not make it out of the home
market. you only hear about the winners.

When it works digital TV image quality is excellent but there are
interference problems. Another which has recently come to light in the
UK is that older cars with inadequate spark gap suppression and mopeds
with magneto ignition seem to generate wideband interference right up
into the GHz band. Loss of picture is in part correlated with mopeds
going past - shades of "Local Hero".

Regards,
Martin Brown

 

[JosephKK]

On Wed, 22 Oct 2008 19:09:56 GMT, "Kevin Aylward"
<kaExtractThis@kevinaylward.co.uk> wrote:

JosephKK wrote:
On Mon, 20 Oct 2008 14:41:44 +0100, Eeyore
rabbitsfriendsandrelations@hotmail.com> wrote:



JosephKK wrote:


snip

Nor have i disagreed when those points were expressed. They are
quite true. In the long run i think i might use a valve
preamplifier to get the sound and a highly derated very linear post
amp.

Several people have done this in the past. The name Phoenix comes to
mind which was funded by (I think by then) ex-members of the band
Argent. That's the first I know of.

I suspect Marshall is doing something like this now too but I'm not
up to date on their stuff, it's not actual 'pro' audio, it's what we
call MI (musical instrument) technology.

And for the masses we now have what's called prosumer. Near real pro
kit performance at a bargain price and usually in small sizes but
more of a 'consumable' than real pro kit. Some can be quite good
actually. I've designed a fair few of that ilk myself.

Graham

My first piece of semi-pro gear is an Ampex AX-300 open reel tape
deck, i still have it. Hey, i can afford to put new heads on it now.
Probably only $2400 now, if i can find them. Damn, i will need a
calibration tape too, if i can find it.

For me, analogue tape is like dos, dead.

Throw it away and get a cheap digital one


www.kevinaylward.co.uk

Not until i finish digitizing some otherwise irreplaceable tapes
recordings.

 

[Richard The Dreaded Liber]

On Wed, 22 Oct 2008 19:42:13 -0500, krw wrote:

In article <pan.2008.10.22.21.46.47.291962@example.net>, null@example.net
On Wed, 22 Oct 2008 09:50:27 -0700, mpm wrote:
On Oct 22, 12:38pm, Jim Thompson <To-Email-Use-The-Envelope-I...@My-

Even if they have to create fictional voters to do it :-(

Who better to recognize fiction than the Republicans?

Libertarians are better at _recognizing_ it - both of the socialist
parties (democrat and neocom) are wallowing in it.

The DemonicRats *ARE* the neocoms.

Sorry - my typo; I meant "neocons" as in "Neo-conservative", which
is essentially a nazi in a republican suit.

Let's face it - they're just the two wings of the same statist/socialist
bird.

Thanks,
Rich

 

[Sjouke Burry]

Eeyore wrote:

John Fields wrote:

Eeyore wrote:
John Fields wrote:
Eeyore wrote
How about flatness in the audio band ?
absence of content

JF
Did you have something useful to contribute or were you simply dumbstruck by a very
simple question ?
---
More than likely I just thought the question wasn't worth answering.

So you'd be happy with the -3dB @ 20Hz and 20kHz of the 60s and 70s ?

Graham

As you cant hear the quality difference anyway,

why not???
Oh I forgot those people with VULCAN ears, who can hear
the difference beween oxygen content in cables.......
or gold plated mains sockets.....

 

[JosephKK]

On Thu, 23 Oct 2008 08:23:10 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Thu, 23 Oct 2008 00:58:56 -0700, JosephKK <quiettechblue@yahoo.com
wrote:

On Tue, 21 Oct 2008 09:44:13 -0700 (PDT), mpm <mpmillard@aol.com
wrote:

On Oct 21, 10:21?am, Richard Henry <pomer...@hotmail.com> wrote:

You don't get arrested for plumbing without a license

Agreed. I was just responding to Terrell's terminology, as he lived
there.
Substitute "citation" or "get a fine" for arrest if you like.
But I don't live or work there, so I really don't know.

-mpm

Perhaps i can clear the air a bit. I have not researched Ohio laws
but there is such a thing as "uniform state laws" mostly. An
organization called "National Committee on Uniform State Laws" formed
under the Constitutional "full faith and credence" law issue between
the states, caused the creation early on. See:

http://www.law.cornell.edu/uniform/uniform.html

Pro-life vs Pro-choice and the alternative marriage issues are driven
by this issue. Thus efforts to decide it nationally. The national
issue effort only trades local variation for global variation, but
adds input from many more cultural points of view.

Here in the US, perhaps we should just kill the extremists and walk
away from fighting about it for a while.

8=(


In trades (and engineering) it is _uniformly_ the rule/regulation/law
that only the "responsible" person needs the license... think P.E. for
example.

I can think of only a few instances where all workers need
(industry-specific) licenses, at least here in AZ... beauticians,
heavy truck drivers, securities salesmen, and certain real estate
agents.

For other jobs I am sure it varies substantially by state.

...Jim Thompson

Spot on. Now, trying to clarify further, there is usually a union
moderated trade skill licence, there is the state moderated
contractors licence, and the county moderated business licence. Plus
to own a company and have employees there is the federally moderated
EIN for income and SSI taxation.

 

[John Fields]

On Thu, 23 Oct 2008 15:26:18 +0100, Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote:

John Fields wrote:

Eeyore wrote:
John Fields wrote:
Eeyore wrote

How about flatness in the audio band ?

absence of content

JF

Did you have something useful to contribute or were you simply dumbstruck by a very
simple question ?

---
More than likely I just thought the question wasn't worth answering.

So you'd be happy with the -3dB @ 20Hz and 20kHz of the 60s and 70s ?

---
Still isn't.

JF

 

[Jim Thompson]

On Thu, 23 Oct 2008 09:31:09 -0700, JosephKK <quiettechblue@yahoo.com>
wrote:

On Thu, 23 Oct 2008 08:23:10 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:


On Thu, 23 Oct 2008 00:58:56 -0700, JosephKK <quiettechblue@yahoo.com
wrote:

On Tue, 21 Oct 2008 09:44:13 -0700 (PDT), mpm <mpmillard@aol.com
wrote:

On Oct 21, 10:21?am, Richard Henry <pomer...@hotmail.com> wrote:

You don't get arrested for plumbing without a license

Agreed. I was just responding to Terrell's terminology, as he lived
there.
Substitute "citation" or "get a fine" for arrest if you like.
But I don't live or work there, so I really don't know.

-mpm

Perhaps i can clear the air a bit. I have not researched Ohio laws
but there is such a thing as "uniform state laws" mostly. An
organization called "National Committee on Uniform State Laws" formed
under the Constitutional "full faith and credence" law issue between
the states, caused the creation early on. See:

http://www.law.cornell.edu/uniform/uniform.html

Pro-life vs Pro-choice and the alternative marriage issues are driven
by this issue. Thus efforts to decide it nationally. The national
issue effort only trades local variation for global variation, but
adds input from many more cultural points of view.

Here in the US, perhaps we should just kill the extremists and walk
away from fighting about it for a while.

8=(


In trades (and engineering) it is _uniformly_ the rule/regulation/law
that only the "responsible" person needs the license... think P.E. for
example.

I can think of only a few instances where all workers need
(industry-specific) licenses, at least here in AZ... beauticians,
heavy truck drivers, securities salesmen, and certain real estate
agents.

For other jobs I am sure it varies substantially by state.

...Jim Thompson

Spot on. Now, trying to clarify further, there is usually a union
moderated trade skill licence,

From all the folderol I don't think the general public has a clue
regarding apprentice versus journeyman.

there is the state moderated
contractors licence, and the county moderated business licence. Plus
to own a company and have employees there is the federally moderated
EIN for income and SSI taxation.

Yep.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

"The American Republic will endure until the day Congress
discovers that it can bribe the public with the public's money."

- Alexis de Tocqueville

 

[JosephKK]

On Wed, 22 Oct 2008 07:21:27 -0700 (PDT), mpm <mpmillard@aol.com>
wrote:

On Oct 21, 11:23?pm, UltimatePatriot
UltimatePatr...@thebestcountry.org> wrote:
On Tue, 21 Oct 2008 06:32:36 -0700 (PDT), mpm <mpmill...@aol.com> wrote:
That fact that JP hasn't been arrested yet is not itself proof of
anything,

? One does not get arrested for practicing plumbing without a license.

? At best, one would get cited to court IF there was even a statute for
it.

You must have a hard-on for me or something.
Did you really feel the need to single this comment out, after I had
already said that I was merely using the words that Mike Terrell
posted?

Rather than try to ding me, why don't you go get you some education?
It would serve you better in the long run.

-mpm

Don't let this troll get your knickers in a knot. This is just one
more sock puppet of AlwaysWrong / DimBulb.

 

[Jan Panteltje]

On a sunny day (Thu, 23 Oct 2008 10:27:08 -0500) it happened Vladimir
Vassilevsky <antispam_bogus@hotmail.com> wrote in
<0J0Mk.5712$be.3177@nlpi061.nbdc.sbc.com>:

above 15kHz only the young can hear, above
20kHz only bats I think (and you perhaps),

The nonlinear mixture of 19 and 20kHz will produce the clearly audible
tone at 1kHz. If you want to be reasonably linear at 15kHz, then the
bandwidth should be extended well beyond the audible range.

I am not sure, frequency response is different from a non-linear curve.
If the amp is linear then you get no mixing products,
even if the freq response is not flat in that area.
Or am I missing something here?

Not too long ago I had the ocsillation at full power in the amp with the
frequency about 40kHz. I felt that

Those little piezo tweeters will go that high, I have tried.
I killed 4 of those.

 

[Jan Panteltje]

On a sunny day (Thu, 23 Oct 2008 16:40:33 +0100) it happened Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote in
<49009AF1.493247A2@hotmail.com>:

And 3dB is easily corrected with a graphic equaliser no?

Graphics are crap. It's like trying a crappy way to fix something that's
fundamentally broken.

Care to tell me why graphic equalisers are crap?
I wrote one that seems to work just fine (actually copied some of that code
from xine).

 

[Eeyore]

JosephKK wrote:

Not until i finish digitizing some otherwise irreplaceable tapes
recordings.

Oh. I have a John Peel session of Pink Floyd !

Graham

 

[Eeyore]

Jan Panteltje wrote:

On a sunny day (Thu, 23 Oct 2008 15:26:18 +0100) it happened Eeyore
rabbitsfriendsandrelations@hotmail.com> wrote in
4900898A.259B7E20@hotmail.com>:

So you'd be happy with the -3dB @ 20Hz and 20kHz of the 60s and 70s ?

Graham

Below 20 Hz sound is not audible, but you can feel the vibration,

You're not kidding.

(recently tried that), above 15kHz only the young can hear, above
20kHz only bats I think (and you perhaps), then there is the speaker...

I could hear 24kHz when I was in my early 20s.

Looked for a nice electrostat few days ago, bit expensive though.
So, if I want hifi I use the Senheiser headphones.
And 3dB is easily corrected with a graphic equaliser no?

Why an equaliser when suitable design removes the need ?

Better amps are wasted on me I am afraid.

PS
till how many MHz can YOU hear?

Don''t be silly.

Grham

 

[Eeyore]

Sjouke Burry wrote:

Eeyore wrote:

John Fields wrote:

Eeyore wrote:
John Fields wrote:
Eeyore wrote
How about flatness in the audio band ?
absence of content

JF
Did you have something useful to contribute or were you simply dumbstruck by a very
simple question ?
---
More than likely I just thought the question wasn't worth answering.

So you'd be happy with the -3dB @ 20Hz and 20kHz of the 60s and 70s ?

Graham

As you cant hear the quality difference anyway,
why not???
Oh I forgot those people with VULCAN ears, who can hear
the difference beween oxygen content in cables.......
or gold plated mains sockets.....

Whilst your examples are inderd absurd, a flat frequency repsonse is not.

I work in pro-audio - you don't. I hear things you can't. To me you're simply a deaf cunt
and competely irrelevant.

Graham

 

[Eeyore]

John Fields wrote:

Eeyore wrote:
John Fields wrote
Eeyore wrote:
John Fields wrote:
Eeyore wrote

How about flatness in the audio band ?

absence of content

JF

Did you have something useful to contribute or were you simply dumbstruck by a very
simple question ?

---
More than likely I just thought the question wasn't worth answering.

So you'd be happy with the -3dB @ 20Hz and 20kHz of the 60s and 70s ?

---
Still isn't.

Isn't what you POS ?

 

[Eeyore]

John Fields wrote:

Eeyore wrote:
John Fields wrote:
When the output of the AND goes high it resets the RS latch made from
the two NORs, and the ALARM output will go low, causing an audible alarm
to sound, which will alert the RADAR operator (or whoever's on watch) to
the fact that an object has just been detected at the range set by MS1.
JF

Funnily enough, they were working on a new collision avoidance radar system when I was
at Kelvin Hughes. That wasn't my project though. I was working on new spec Rhine River
Radar intended for barges and the like using the Rhine (and doubtless other
waterways).

If you're interested I could explain what their problem was and how I told them the
answer from my bed in 30 seconds.

---
Sure; what the hell...

Does the mean you want to know or not ?

It's basic physics btw.

Graham

 

[Eeyore]

Jan Panteltje wrote:

Those little piezo tweeters will go that high, I have tried.
I killed 4 of those.

Piezos are shit. Check their voltage input.

Graham