Bill Unruh a écrit :
> On Wed, 5 Jul 2006 [EMAIL PROTECTED] wrote:
>
>> Hello,
>>
>>
>> *** description :
>> I want to record wav files from several *identical* (except for serial
>> number) usb audio soundcard.
>
>
> Just a comment-- it is highly unlikely that the cards actually are
> identical-- ie the oscillators on the cards are likely not to have the same
> rates. While not a problem on short recordings, a 5 (.01%) sample per
> second error
> from one to the next would have the cards out by a third of a second on a
> one hour recording.
>
> Or if you mixed them, sounds would be in and out of phase periodially,
> sometimes cancelling from the one the cards, sometimes adding.
>
> Of course that may not be a problem for you. Or you may be able to
> resample them to bring the time bases into line.
>
Thanks for the info. However this not a problem for me. The sound cards
are used to record simultaneous but independant talks and results are
never mixed.
Regards,
Xavier
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