[wdmaudiodev] Re: Direct KS question

  • From: "Andrew Sherbrooke" <asher@xxxxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Fri, 11 Jun 2004 10:10:18 -0700

Hi DJ,

>It sounds as if there are errors being produced by either the USB Audio
>driver or somewhere on the stack below that. What error messages (if
>any) are you receiving in your requests? 

By this, do you mean the DeviceIoControl call (which uses
IOCTL_KS_READ_STREAM)? If so, just ERROR_IO_PENDING, in all cases.

>There is nothing in the USB
>Audio driver that prohibit higher sample rates of 96kHz unless perhaps
>you are trying to receive 6 or 8 channels at 24bit or some other
>combination which would max out USB bandwidth.

No, just stereo, in one direction. Again, it appears that stereo output
works, but stereo input often shows this problem...

Thanks for your help!

Andrew Sherbrooke


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