[wdmaudiodev] Re: (no subject)

  • From: "M'hand Boughias" <mhand@xxxxxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Mon, 8 Oct 2012 15:49:06 +0200

You cannot hear anything because the VAD is not linked to any hardware
audio device. You need to reroute the audio from the VAD to a physical
audio device.
I am not sure about this, but I think that we cannot add FxProperties to
this MSVAD because it is a WaveCyclic Driver. Perhaps It would be possible
with the new sample from Microsoft AEVAD (
which is a WaveRT Driver.


On Mon, Oct 8, 2012 at 2:30 PM, Vinayak Srivastava

> Hi,
> I need to develop a virtual audio driver in windows (vista and above)
> which should provide me with FxProperties page under the registry entries
> for this virtual driver.
> I tried with MSVAD (Microsoft Virtual Audio driver as mentioned
> http://code.msdn.microsoft.com/windowshardware/virtual-audio-device-3d4e6150#content)
> but I'm facing two issues with this:
> 1. Even though I set it as default audio driver in sounds but I cannot
> hear any output sound. I can see the sound waves being displayed in the
> playback tab of the Sounds dialog, but no actual output is observed.
> 2. It does not have any FxProperties Key in the registry as opposed to
> other regular sound drivers. It contains only the Properties key in the
> registry.
> I actually need to register my custom sAPO sample to a virtual audio
> driver.
> Please infrom me if I'm missing something here. Any pointer to an
> alternate approach will also be helpful.
> Regards,
> Vinayak S

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