[RTTY] Sound Card Testing

[Robert McGwier]

The cards above the "Gold level" in that table are professional audio 
cards with the associated price tag.  The Turtle beach is at the top of 
the list of  "consumer" cards.  You do not need 113 dB of dynamic range 
for amateur sound card applications (not SDR but TTY programs) so why 
would anyone doing TTY spend $2500 on the Lynx Two?

Those cards above the gold line get their performance in these tests 
because they are 24 bit sound cards.  Most sound card programs doing TTY 
(all of them?) open the cards using directX or
MME (not WAVEFORMATEXTENSIBLE) and this limits them to 16 bits.  You 
then get the same noise floor and dynamic range as the Turtle Beach.  
The Turtle beach is not perfect but it is a great buy at its current price.

Bob McGwier
N4HY


Jim Reisert AD1C wrote:

>--- Peter Laws <plaws0 at gmail.com> wrote:
>
>  
>
>>On 7/25/05, Alex, VE3NEA <alshovk at dxatlas.com> wrote:
>>    
>>
>>>Tony,
>>>
>>>A fairly good sound card comparison table is here:
>>>http://www.pcavtech.com/soundcards/index.htm
>>>      
>>>
>>Doesn't seem to be ham-radio focused ...  
>>    
>>
>
>Bob McGuire (N4-something) did some testing a year or two ago and concluded
>that the Turtle Beach Santa Cruz was the best.  It's pretty high on the
>pcavtech list as well.  Search the archives.
>
>- Jim
>
>
>--
>Jim Reisert AD1C, 7 Charlemont Court, North Chelmsford, MA 01863
>USA +978-251-9933, <jjreisert at alum.mit.edu>, http://www.ad1c.us
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>  
>