Re: Sound card?

krw wrote:
On Sun, 01 Feb 2009 09:44:05 -0800, Joerg
<notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:

krw wrote:
In article <kN4hl.47$oF7.35@xxxxxxxxxxxx>, jamie_ka1lpa_not_valid_after_ka1lpa_@xxxxxxxxxxx says...>
krw wrote:
In article <n3p7o49ef7o1v7miv6ovk03qqqergcbraq@xxxxxxx>, quiettechblue@xxxxxxxxx says...>

On Wed, 28 Jan 2009 08:46:34 -0600, krw <krw@xxxxxxxxxxxxx> wrote:


In article <glpmsd$8vd$1@xxxxxxxxxxxxxxx>, pNaonStpealmtje@xxxxxxxxx says...>

On a sunny day (Wed, 28 Jan 2009 07:22:07 -0600) it happened krw
<krw@xxxxxxxxxxxxx> wrote in <MPG.23ea17fa87994e969898d0@xxxxxxxxxxxxxxxxxxx>:


Anyone have a suggestion for a decent sound card? I've tried three (the internal, a Creative Soundblaster external, and Turtle Beach Audio Advantage SRM) and all have severe, but different, problems.
It would help if you told us what problems, and what you want to do with
that sound card.
It's used in a audio test fixture (http://www.ymec.com/) to set up a hybrid circuit. The internal sound card has sort of 5MHz oscillations that feed through the audio circuits (still don't understand it completely) and screw up the distortion measurements, though the sweep is clean. The SoundBlaster external has about 20dB of amplitude modulation on its outputs when the software is sweeping. The inputs see the same sort of thing but not even in phase so I can't just divide the two. The Turtle Beach unit has horrible distortion (they dodn't even specify the codec - wouldn't be surprised if it were only 8 bit).


I have 2 Creative soundcards in this PC, the cheapest one is the best one.
Problems? What problems? It all works...
I do not understand how your problems are occurring, it is rather
contrary to the basic design of these sound cards.
No, the primary design consideration of PeeCee quality sound cards is COST. The secondary design consideration is also COST. All other considerations are way down the list behind COST.


Just the same try looking in the semi-pro low-pro audio region like
RME Hammerfall. The kind of equipment used to make a compromise home
studio.
Others have suggested some alternatives, as well. I'm making do with the Turtle Beach SRM but my distortion measurements are useless. I'll see if the boss wants to spend money. Too late for this design though.



SOunds more like a Software issue in the decoder.
No it really doesn't. Each one has different characteristics.

I've done DSP (FFT/DFT), with various sound cards, good
and crappy one's.
Take a real good look at the time domain data under various input signals (pulses, test tones etc.). Maybe you had bad luck and really ended up with all the sound card lemons while Jamie and I lucked out and received the good stuff ;-)

The card with the severe distortion doesn't *look* like there is any
distortion. At tens of percent (maybe 50% in the extremes) I should
see something ugly. Nope. The Creative card has output modulation
that is simply rotten. I can easily see that on an external scope
hooked to the same points. It also has something going on on the
input side too because it's visible on the stereo traces and not in
"phase" with the input or each other.

If the card OSR pointed out looks better I'll push for a better sound
card. The budget is a bit tight right now though.


I am afraid something else is going on in that PC. I can't do another scope plot from one of mine right now because that part of the lab is being renovated right now. Restoring concrete this afternoon, oh what fun. But the sound card output signals (any sound card) never looked rotten.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
.

Relevant Pages

  • Re: Sound card?
    ... (the internal, a Creative Soundblaster external, and Turtle Beach ... Audio Advantage SRM) and all have severe, but different, problems.. ... that sound card. ...
    (sci.electronics.design)
  • Re: Sound card?
    ... Anyone have a suggestion for a decent sound card? ... (the internal, a Creative Soundblaster external, and Turtle Beach ... Audio Advantage SRM) and all have severe, but different, problems. ... understand it completely) and screw up the distortion measurements, ...
    (sci.electronics.design)
  • Re: Sound card?
    ... Anyone have a suggestion for a decent sound card? ... (the internal, a Creative Soundblaster external, and Turtle Beach ... Audio Advantage SRM) and all have severe, but different, problems. ... understand it completely) and screw up the distortion measurements, ...
    (sci.electronics.design)
  • Re: Sound card?
    ... Anyone have a suggestion for a decent sound card? ... (the internal, a Creative Soundblaster external, and Turtle Beach ... Audio Advantage SRM) and all have severe, but different, problems. ... The secondary design consideration is also COST. ...
    (sci.electronics.design)
  • Re: Sound card?
    ... Anyone have a suggestion for a decent sound card? ... (the internal, a Creative Soundblaster external, and Turtle Beach ... Audio Advantage SRM) and all have severe, but different, problems. ... The secondary design consideration is also COST. ...
    (sci.electronics.design)