[wdmaudiodev] Problems with usbaudio.sys under XP

  • From: "Thomas Zepf" <thzepf@xxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Fri, 28 Mar 2003 16:54:58 +0100


i have some problems with my current usbaudio project under XP.
The device has Wave In , Wave Out and a Midi Interface.

In order to prevent bluescreens when the device is used with 
98SE and w2000 I declared the midinderface as custom (0xFF)
instead of  AudioClass(0x03). 
I am using a custom Midi driver based on DMUS for that interface
and the driver gets properly loaded on W2000 for the Vendor Inderface.
After that usbaudio.sys is loaded for the audio parts
Unfortunately under XP usbaudio.sys does not load. Therefore I have
no Wave In and Wave Out. :-)

My device is full compilant with the Midi spec and Audio Spec 
and when I change the Class to 0x03 audio and Midi is working 
properly under XP. 
This is not an option at the moment, because there are to much 
problems with that config in older OS.



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