[wdmaudiodev] Re: USB audio record problem

  • From: "Daniel E. Germann" <deg@xxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Fri, 14 Oct 2011 19:33:00 -0500

Hi, Jeff.

I gave that a try, just in case, but it didn't make a difference.  I'm still getting 000000's and FFFFFF's, with junk in the LSB.

It was worth a try, though -- thanks for the suggestion.  I do remember one of our customers having problems when they set dwChannelMask to FFFFFFFF.



From: "Jeff Pages"
To: <wdmaudiodev@xxxxxxxxxxxxx>
Date: Sat, 15 Oct 2011 10:32:38 +1100

Hi Daniel,

I did read somewhere (don't ask me to find it, though) that dwChannelMask should be set to zero for audio capture, although looking at my own code for capturing 24-bit audio in 32-bit containers I've set it to SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT and it's worked fine. All my stuff has been with PCI or PCIe devices, though, not USB.

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