[wdmaudiodev] Re: Capture audio from USB Audio Device on XP (SP2)

  • From: "Jerry Evans" <jerry@xxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Tue, 14 Feb 2006 15:44:49 -0000

Hi Edwin

Try to open the device using the WAVEFORMATEXTENSIBLE first, changing your wfx.SubFormat = KSDATAFORMAT_SUBTYPE_PCM to GUID_NULL and the dwChannelMask member to KSAUDIO_SPEAKER_DIRECTOUT (0).

This works as expected on XP SP2 and Microsoft USB Audio class driver with Roland, GuitarPort and iMic hardware.

I'd be interested to know what how low latency you get before glitching occurs.

HTH

Jerry.



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