[wdmaudiodev] Re: Audio Mixer control applet

  • From: Frank Yerrace <Frank.Yerrace@xxxxxxxxxxxxx>
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Wed, 16 Dec 2009 22:45:14 +0000

I'm assuming you are concerned with Windows Vista and 7. If we had created a 
Device Topology<http://msdn.microsoft.com/en-us/library/dd370825(VS.85).aspx> 
interface for accessing the equalizer then this would have been easier, but we 
didn't. So you may be interested in reading this MSDN article Using the 
IKsControl Interface to Access Audio 

Frank Yerrace

This posting is provided "AS IS" with no warranties, and confers no rights.

From: wdmaudiodev-bounce@xxxxxxxxxxxxx 
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Bogdan Sataric
Sent: Tuesday, December 15, 2009 6:07 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Audio Mixer control applet

I want to develop an Audio Mixer control applet similar to sndvol32.exe that 
Windows XP exposes for my USB Audio device. The device will use the generic USB 
audio driver provided by Windows so the idea is to create a GUI for some 
advanced settings controlled by standard USB Audio Class 1.0. For example, my 
device supports equalizer building block of a feature unit and I would like to 
control it via this GUI. I have noticed that USB Audio driver on Win7 sends the 
requests for Equalizer but there is no GUI allowing to control it in Win7 mixer.

Is this possible? Which Windows APIs should I look into? Are there any examples 
with similar functionality available? Would it be possible to register such 
application so it is loaded instead of sndvol32.exe or the equivalent on the 
later OS'?

Thanks in advance for the answers.

Bogdan Sataric

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