SPOT ON!!! Congrats.
de Rick
On Fri, Aug 10, 2012 at 2:59 PM, Richards <jruing@ameritech.net> wrote:
> I will hazard a WAG about the use of external sound cards.
>
> In the speech recognition world, it was discovered that some internal
> sound cards, especially those built onto the motherboard, were poorly
> implemented and were subject to EMI/RFI interference, adding noise to
> the analog signal ahead of the DAC - so we went to external sound cards
> (in that venue they are affectionately known as "USB sound pods" - which
> did the DAC closer to the microphone, and external to the electrically
> noisy internal computer case - this was especially the case with laptop
> computers - and in most cases, the problem could have been solved with
> five cents worth of shielding.
>
> So, I am thinking you are externalizing the DAC (Digital to Analog
> Conversion) to avoid EMI/RFI issues.
>
> Any traction? Do I win the cigar ?
>
> My next guess would involve native driver issues... ;-)
>
> ==================== James -K8JHR ==================
>
> On 8/10/2012 7:43 AM, Rick Dougherty NQ4I wrote:
>
> , a computer with
> > USB sound card external interface(anybody know why), H
>
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