[linux-audio-user] Re: Audio interface recommendations

[Andres Cabrera]

Interesting.
I did two measurements @96000, first with a tone sweep, and then with 
white noise. The results were:

Tone sweep:
www.geminiflux.com/Stuff/snapshot1.png
White noise:
www.geminiflux.com/Stuff/snapshot2.png

The card being use was Echo Mona Laptop, the microphone a Shure Beta58 
(which might account for the weird behaviour), and the speakers were 
Mackie HR824.
I'll give it a try next week with a better microphone.
Cheers,
Andres

Jon B wrote:

>>I guess the antialias filter starts rolling at around 20, and uses all
>>the extra bandwith to avoid making the filter steeper and messing the
>>'audible' audio. Just a guess. I would guess most music recording
>>interfaces do this.
>>    
>>
>
>I realized why they do this.  With variable sampling frequencies,
>44.1, 48, 96, you would need different filters to get the best out of
>each one.  So they just do 20 once and throw away the extra bandwidth.
> So does that mean they will alias at sampling rates like 11025?  This
>could be tested, too.
>
>
>
>  
>