[wdmaudiodev] Re: msvad vista problem

  • From: Tim Roberts <timr@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Wed, 15 Oct 2008 10:13:34 -0700

venkat reddy wrote:
>  I am developing the virtual audio driver based on MSVAD sample.
> My requirement is capture the audio and pass to user mode application
> (lets X) .This X application pass the audio to remote application on
> different machine. If  I change the volume level on main PC it should
> not affect on remote machine.

That goal is not achievable.  You cannot predict where the final mixing
will take place.

> I made the VAD as my default audio device to capture the audio and
> pass to X application (using Copyto &Copyfrom in MSVAD).Everything is
> working fine on XP.
> But the problem is on vista PC if I change the volume level  it has
> affecting the volume on remote machine.

Right.  You can try writing an LFX APO to capture the output stream
prior to mixing, but I'm not hopeful that will achieve your goal, either.

Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.


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