> 
> One thing that I do notice is that if I turn my amp up to full while
> connected to my 2496 soundcard I hear no hiss or noise at all.  Switch it to
> my SoundBlaster Live and wham! there is so much hiss, even when all outputs
> are muted in windows ;-)
> 

By the way, which 2496 sound card do you have?

Regards,

-- 
Laurent ARTAUD (lau### [at] freefr)

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in news:404e3ba9$1@news.povray.org Severi Salminen wrote:

> I don't think there are many printers (or 
> video cards) that accept 48bit data - does anyone know?
> 

Maybe giclee fine art color printers in the $20,000+ range, but I doubt 
it.

A way to improve digital B&W printing is to print in duo-tone or even tri-
tone. There are third party adaption kits for Epson printers to do this.

For slide printers, probably only the high-end Kodak LVT printers support 
48 bit. It uses a laser as source. Other film recorders, like the polaroid 
palette, use a CRT as source and thus have a more limited contrast and 
tonal range.

Ingo

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> Everytime I boot up, my monitor dims as the colour profile kicks in.
>

I fear not. Photoshop installs a tool called "Adobe Gamma Loader"
and I assume PaintShop does something similar.
Such tools do a reinitialization of the Gamma LUT to compensate
the difference between the "real" physical gamma of the monitor
and the Windows default gamma of 2.2 (this explains the change
in brightness you may see) . Bus this has little to do with color
management and nothing with ICM.

-Ive

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On Wed, 10 Mar 2004 21:18:28 +0100, "Ive" <ive### [at] lilysoftcom> wrote:

>
>> Everytime I boot up, my monitor dims as the colour profile kicks in.
>>
>
>I fear not. Photoshop installs a tool called "Adobe Gamma Loader"
>and I assume PaintShop does something similar.

I know. It's the Loader doing its job.

PSP has something similar when it starts - it's form of color
management - but I always found it too warm/yellow.

>Such tools do a reinitialization of the Gamma LUT to compensate
>the difference between the "real" physical gamma of the monitor
>and the Windows default gamma of 2.2 (this explains the change
>in brightness you may see) . Bus this has little to do with color
>management and nothing with ICM.

Really? You see this is what always confuses me. I still habe not
totally  fathomed out the differences in color management, profiles,
proofing etc.

>
>-Ive
>

--------------------------------
My First Subgenius Picture Book:
http://www.imbjr.com

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laurent.artaud[AT]free.fr" <"laurent.artaud[AT]free.fr wrote:
> > One thing that I do notice is that if I turn my amp up to full while
> > connected to my 2496 soundcard I hear no hiss or noise at all.
> > Switch it to my SoundBlaster Live and wham! there is so much hiss,
> > even when all outputs are muted in windows ;-)
> >
>
> By the way, which 2496 sound card do you have?

Midiman Delta Dio

I have just done some tests on my system...

First off, the background noise level of my soundcard/amp/speakers is
about -93dB with the Midiman and about -65dB with the SBLive.  I have to
turn my volume control up to at least double what I normal use for music to
be able to hear the -80dB.  I suspect if burnt the WAV to a CD a played it
without my PC on and no other sounds I would be able to hear it at normal
listening volumes.

Next the square wave test.  I made a file split into two halves, all at
24/96.  The first half was just a pure 10kHz note, the second half was the
same but with a 30kHz note added with an amplitude of 1/3 (ie a square wave
filtered off at 48kHz).  Could I tell the difference?  Not a dicky bird,
even though the waveform looked quite different.

I even added harmonics at 20, 30 and 40kHz and could still tell no
difference from the pure 10kHz sine wave.

After a bit more testing, I found I could hear frequencies up to about
18.5kHz, so for me, a sampling rate of 41kHz would sound the same as
anything higher (assuming 10% bandwidth for non-perfect analogue filters).

This has all got rather OT :-)

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scott <sco### [at] spamcom> wrote:
> Do you have a link to a 24/96 sample file I could use to compare?

  Do you really have a soundcard capable of playing 24/96 sounds?
Those soundcards which can are usually quite expensive pro cards.
  If you have a regular soundblaster or whatever, it will just
downsample it to 16/48 (supposing it doesn't refuse to play it
at all) and naturally you won't hear any difference (or the
24/96 may even sound worse if the soundcard makes a crappy
downsampling job).

  But to answer your question: Nope. I have no idea where you could
get those kind of samples.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

Post a reply to this message

Ive <ive### [at] lilysoftcom> wrote:
> > > Somehow this
> > > reminds me on people who seem to think a 64bit CPU is twice as fast as a
> > > 32bit one.

> Yes, sure you are right and your example is much better. It was just the case
> that a few minutes before writing this I did read a posting where somebody
> seriously did say this.

  It's nothing new. When Intel introduced their 386 processor some people
claimed that 32-bit programs would run twice as fast as the back then
current 16-bit programs... :)

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

Post a reply to this message

Severi Salminen <sev### [at] not_thissibafi> wrote:
> I don't think there are many printers (or 
> video cards) that accept 48bit data - does anyone know?

  For grayscales it would be enough if the printer supported 16-bit B/W
images... But I suppose you won't find those in your nearest store
either. :)

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -

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Warp wrote:
> scott <sco### [at] spamcom> wrote:
>> Do you have a link to a 24/96 sample file I could use to compare?
>
>   Do you really have a soundcard capable of playing 24/96 sounds?

Yes.  Although my current speakers only go up to 22kHz.

> Those soundcards which can are usually quite expensive pro cards.



>   If you have a regular soundblaster or whatever, it will just
> downsample it to 16/48 (supposing it doesn't refuse to play it
> at all) and naturally you won't hear any difference (or the
> 24/96 may even sound worse if the soundcard makes a crappy
> downsampling job).

Indeed.

>   But to answer your question: Nope. I have no idea where you could
> get those kind of samples.

Post a reply to this message

> 
> Midiman Delta Dio
> 

Thank you for this info! I though Midiman was only making midi 
interfaces... But they seems to be making hi-quality sound cards (and 
your's, as well as most of their other ones, is totally compatible with 
Linux. Joy!)

 > (snip)
 >
> After a bit more testing, I found I could hear frequencies up to about
> 18.5kHz, so for me, a sampling rate of 41kHz would sound the same as
> anything higher (assuming 10% bandwidth for non-perfect analogue filters).
> 
> This has all got rather OT :-)
> 
> 

Damn! Well, there are some people that can hear it. I will have to test 
it, when I will have the according hardware to generate the tests 
waveforms. Last time I checked, I could hear up to 20KHz. Let's see if 
it has changed.

Regards,

-- 
Laurent ARTAUD (lau### [at] freefr)

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