Re: lateral mosfets vs. bjts in audio amplifier design

[Rich the Philosophizer]

There is however now scientific proof against the concept of free will.

That's impossible. The Universe is MADE OF Free Will. (or either it's the
same kind of "science" that the warmingists use.)

Cheers!
Rich

 

[Rich the Philosophizer]

Hey, I just decided not to start in a fight 'yes there is' 'no there is
not', but as people might be interested in a scientific way to look at
free will, here is a link that talks about that experiment I was referring
to:
http://www.dailymail.co.uk/sciencetech/article-560149/So-free-really-just-illusion.html

Here's an experiment you can do while sitting at your computer, and you
can find out for yourself if Free Will exists:
http://www.godchannel.com/runenergy.html

And truly, what harm could it do to try the experiment? (other than the
danger that you'll find out that your dogma is in error.)

Have Fun!
Rich

 

[Eeyore]

You're a twat.

So you have no clue!
I am beginning to think John Lurkin's remarks about you are correct.
You do not deliver when it gets real.[/QUOTE]

It has NOTHING to do with code.

The simple truth of the matter is most users either don't know how to use a graphic
equaliser and / or abuse them.

I have in the real world seen an example where almost all the frequencies had been
'pulled' completely in order to get over a feedback problem (which it didn't). And
then I had to fix it because I was taking over the mix and it wasn't going to sound
that bad 'on my watch'.

It's the audio equivalent of painting yourself into a corner. The unpainting in this
case was time-consuming and frustrating.

It's about how they're (ab)used, not the technology.

Graham

 

[Eeyore]

Pot-Kettle-Black?

Who's the Pot ?

Graham

 

[Eeyore]

Oh, please. Is there any way to stop you? ;-)

It's a horrible subject. Graphic equalisers can make me shudder.

They're commonly used to do the equivalent of pouring Daddies Sauce on haute
cuisine.

Graham

 

[Eeyore]

Audiophoolery?

Tempting financially as it may be (and I have been 'sort of' tempted) I have
more self-respect and integrity than that.

Graham

 

[Eeyore]

John Fields wrote:
with maybe something interesting happening every six months or so.

Yep... tied up and disciplined, that's just the ticket for me. Leather whips
as well if you please.

St Andrew's Cross ?
http://en.wikipedia.org/wiki/X-frame

Graham

 

[Eeyore]

They are very cheap though, at £5 from Maplin. I bought 8 for my twin
brother, but then he's clueless...

Oh, if only I still had that link to a DJ shop that had a 15" driver with
no less than SEVEN piezos above it (one on a flare of sorts).

Graham

 

[Eeyore]

But he wasn't wearing a bondage collar when he visited The Horn.
http://thehorn.co.uk/
There was a very pretty girl who went there who used to. I couldn't resist
sometimes playing with the D ring at the front.

Graham

 

[Eeyore]

Most important bit in "pro" audio is that it won't break under almost
any circumstances, especially on-stage in live situations.

The basic circuit topography is not so important - the older the
better.

Well there are some well proven designs for sure but as well as rugged,
it has to sound good too. There's been plenty of quite clever innovations
over the years. We hardly ever use signal transformers now for example
and more and more circuitry is becoming differential / balanced and ever
lower impedance for low noise. Most hi-fi is a joke in comparison, aside
from loudspeakers. And that's a story in itself.

Graham

 

[Eeyore]

There is clearly massive parallel testing and selection going on. I
even design circuits in my sleep, sometimes weeks after I'd
consciously forgotten the situation. "Intellectualizing" the design
process leads one to treat it as an incremental tweak of prior art,
but brains are way past that.

Yes, I've often found the best way to deal with a tricky problem is simply to
forget about it. Randomly, some time later, the answer pops out.

Graham

 

[Eeyore]

When you do something new and original it gets named after you. Wilson
current mirror, Gilbert cell multiplier, etc., They are getting rarer
now.

The Sziklai pair is one of my faves. I only just discovered it had a name to
it.
http://en.wikipedia.org/wiki/Sziklai_pair

I've often wondered what a triple of that configuration might perform like.
Speed problems possibly ?

Graham

 

[Eeyore]

If you need to boost a frequency band, this eats into dynamic range.
Most people rather live with the "suck out". While most audiophiles
don't even like tone controls, it is somewhat accepted that you can
filter out a peak in a room and it is not the end of the world.
Unless you use remez to generate a linear phase filter, any attempt to
equalize will alter group delay.

It's actually more complicated than this if the room isn't designed to
be well diffused. This is because music is not a sine wave. Given how
the sound bounces off the surfaces, it is possible that a short burst
would need different equalization than a sine wave. In fact, that is
how pseudo anechoic testing is done.

It's really harder to design a good room than a good amplifier. There
are room simulators. Not exactly what the pros use, but you can buy
CARA and simulate room acoustics.
http://www.rhintek.com

Not to mention that a graphic only gives a fixed set of and often inadequate set of
fixed frequencies and the Q of the filters is not adjustable. Plus there is
inter-band 'ripple' in the response.

A parametric equaliser is vastly more powerful in the right hands.
http://en.wikipedia.org/wiki/Parametric_equalization

Graham

 

[Eeyore]

Maybe a few more years and direct brain implants will eliminate the room acoustics factor

Many decades ago I imagined humans with DB9 connectors on the back of their necks for this and
other purposes.

Sorry about the insult a while back btw. I HATE graphics.

Graham

 

[Eeyore]

Maybe the audiophools just make their own problems.

The average audiophool wouldn't know what IMD was. They'd probably think it was a new way of
treating their cables with LN2.

IMD is a genuine thing. High IMD sounds shit.

Graham

 

[Eeyore]

Yes, but you've proven nothing, only proposed a hypothesis.

You mean like 'Global Warming'.

Shame it's actually getting cooler now. I wonder how long before the general
public notice ?

Graham

 

[Eeyore]

Then you agree that my earlier statement:

"There had to have been, however, something which started it all off."

Is correct?

Please don't bring religion into this !

Graham

 

[Eeyore]

No, in fact, it's almost diametrically opposite to religion. Religions
are invested in denial of Free Will - that's why they want to rule you.

My brother-in-law just gave me a briefing on Sarah Palin. Is she really that
dreadful ? It made my blood run cold.

Graham

 

[Eeyore]

No, in fact, it's almost diametrically opposite to religion. Religions
are invested in denial of Free Will - that's why they want to rule you.

What I ment with 'religion' is that 'free will' is assumed as a given fact,
just like religions present ideas without proof.[/QUOTE]

And proof would deny faith. See associated conundrums in the Hitchiker's Guide
to the Galaxy.

Just the kind of attitude we need in a rational world.

Graham

 

[Eeyore]

Also, since we don't know what rules govern the Universe, who's to say
it isn't heaven?

Or God?

But who's God's God ?

Graham