[wdmaudiodev] Re: Need help in KS Topology Test - WinBlue, Wave test- Certification

  • From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Fri, 4 Sep 2015 11:17:57 +0000

The volume level stays constant because SysVad has a sample implementation of
the "hardware peak meter" property... but it doesn't actually calculate the
peaks of the audio data sent to it (we have toyed with the idea of adding this.)

It saves all the data you play to it under C:\stream (unless you turn on DRM or
set a regkey.)

https://github.com/Microsoft/Windows-driver-samples/blob/master/audio/sysvad/savedata.cpp

-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Tim Roberts
Sent: Thursday, September 3, 2015 6:15 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Need help in KS Topology Test - WinBlue, Wave test-
Certification

wdmaudiodev-bounce@xxxxxxxxxxxxx wrote:

When I play a song, the volume level indicator stays constant until
the song stops playing. Is this how it is supposed to behave? And I
can't hear anything. I have set speakers wdm to default.

What did you expect? You have installed a VIRTUAL audio device. There is no
hardware. It's not connected to your speakers in any way. The data you send
to it is thrown away.

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

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