Hi Bob,
The problem was that weaker signals were not decoding (cleanly). It's
difficult to quantify, but judging by ear, the signals should have been
strong enough to fully copy. Changing from the on-board - most likely
AC97-based (I'm not at the site now) - interface to a couple of
different USB devices (an EMU-0202 and a Griffin iMic2) cleared the
problem right up - those weaker signals started decoding just fine.
I think I'm going to go for something in the sound blaster line. I'd
like to have something that does most of the work in hardware, rather
than a software codec - it just seems like that might be more reliable.
Thanks for the input... and for Qs in a bunch of recent contests :)
~Iain / N6ML
Robert Chudek - K0RC wrote:
> "We've tried the on-board audio with MMTTY, and had major problems
> decoding."
>
> What were the major problems you experienced decoding?
>
> To answer you question, virtually any soundcard will provide good
> results. The SB Live! series work well.
>
> 73 de Bob - KØRC in MN
>
>
> ----- Original Message ----- From: "Iain MacDonnell - N6ML" <ar@dseven.org>
> To: <RTTY@contesting.com>
> Sent: Wednesday, February 04, 2009 9:38 PM
> Subject: [RTTY] Affordable PCI sound card recommendations?
>
>
>>
>> I need to outfit a number of WinXP PCs at a contest station for
>> RTTY. We've tried the on-board audio with MMTTY, and had major
>> problems decoding. I got around this for the last contest (RU)
>> by using external USB audio interfaces, but want to install
>> something internal in each PC to make it permanent. I've seen
>> a number of Sound Blaster Live! options on eBay in the order
>> of $10-15 shipped, but thought I'd ask here if there are any
>> particular models that work well, or are known to not work well
>> for RTTY decoding (and maybe AFSK transmit too).
>>
>> TIA for any recommendations...
>>
>> ~Iain / N6ML
>>
>>
>> _______________________________________________
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>>
>
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