[LAD] A little quiz about audio measurements...

[Ralf Mardorf]

Veronica Merryfield wrote:
> Just thinking about what I had wrote and remembered the semantics used here...
>
>   
>> One more hint: card X is a very high end one. It should
>> be 'perfect', or at least much better than card A.
>>     
>
> ... which might suggest that Card X is not performing well. Since it has been stated the card x is not USB, it is possible that this card has it's audio clock derived from the PC clock which is likely dithered - they call it spread spectrum to help reduce radiated noise in testing.
>   

http://www.maxim-ic.com/app-notes/index.mvp/id/3503

And how would this cause the issue?