Folderol wrote:
On Fri, 28 May 2010 19:20:54 +0200
Ralf Mardorf <[email protected]> wrote:
Veronica Merryfield wrote:
On 05/28/2010 02:31 PM, [email protected] wrote:
Hello all,
This week I had to perform measurements on a audio
interface, and this resulted in some quite interesting
results. Before revealing what happened, I'll let you
have a look at some of the data and come up with your
own conclusions, see
<http://www.kokkinizita.net/linuxaudio/quiz.html>
(Free beer at the next LAC for the best analysis)
Ciao,
You can't trust a loop back test.
Any instability or dither on the reference clock of card A (fifo clocking say) is not going to show in a loop back test.
Vrnc
Is Veronica Merryfield the winner?
I'm highly suspicious of the USB link, but can't quite put my finger
on why.
Card A is the USB card. For USB there could be several issues, but I
don't have knowledge about buffering etc., but I guess it's card A and
that there's a "instability" = jitter. I don't know what dither for CLK
is. I guess the winner is Veronica Merryfield.
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