[wdmaudiodev] Re: Direct Sound Question

  • From: "Dugan Porter" <duganp@xxxxxxxxxxxxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Wed, 30 Nov 2005 23:51:11 -0800

Paul, I'm glad to say there is a way to do what you want.  Take a look
9_c_Summer_04/directx/htm/systempropertysets.asp.  This only works in
user-mode code, however.
I have a code snippet demonstrating how to do this which I can send you
directly if you give me your email address.

Dugan Porter - DirectX Audio Team - Microsoft
This posting is provided "as is" with no warranties, and confers no


        From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Paul Gryting
        Sent: Wednesday, November 30, 2005 8:48 AM
        To: wdmaudiodev@xxxxxxxxxxxxx
        Subject: [wdmaudiodev] Direct Sound Question
        I have a wdm audio miniport driver based at one time on the AC97
sample driver.
        This driver will handle multiple device instances (via
        With Info from Richard Fricks, I was able to relate an
application level open wave handle to an individual instance of an
adapter for my hardware to utilize a private interface in the driver for
an alternate control path.
        The problem is, so far I cannot find a similiar method to do
this for a direct sound GUID.
        There is a relationship between DS enumerted devices and wave
enumerated devices, so I was relying on that for the DS device.
        However this relationship is not garenteed, and is always wrong
immediately after chaning the primary audio device.
        Does anyone know how to releate a specific enumerated DS device
(identifed by DS GUID), to a specific driver instance for that device?
         (Or even a garenteed way to relate a direct sound device to its
associated wave deviceID)

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