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Technical Tip For Studio – Audio Synchronisation July 13, 2010

Posted by Jon Ward in eye tracking, Studio, Technology, Tips And Tricks, Tobii, Updates.
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We have had some isolated reports of issues with audio sync problems within certain operating system / set-up combinations, and although many of them are fixed by altering drivers or settings this little tip fr0m Guy at Simple Usability (www.simpleusability.com) is more generic and should be an easier fix for most people. Thanks to Guy for bringing it to our attention.

What is Audiodg.exe?

The audiodg.exe file made its appearance in Microsoft Vista, which explains why I haven’t seen this file before. When I viewed the properties of the file, the description stated Windows Audio Device Graph Isolation, which doesn’t help explain what it does.

After doing a little research I found out that the audiodg.exe file hosts the audio engine for Vista, and from what I hear Windows 7 as well. All the DSP and audio processing is performed within this file. Vendors are able to install their own DSP and audio effects into the audio pipeline, which will then be processed by audiodg.exe.

Unfortunately, this can also lead to some problems, as I experienced. Some audio effects can consume CPU and memory if not properly coded. How do we fix the problem? Lets take a look.

Disabling Audio Effects

In order to fix the high CPU usage, I disabled the audio enhancements processed by the audiodg.exe file. To disable the audio enhancements, use the following steps:

  1. Right-click the speaker icon in the lower right corner.
  2. Select Playback Devices from the menu. A list of devices should appear on the screen.
  3. Double-click the device that has a green checkmark. The properties windows for that device should open.
  4. Click the Enhancements tab at the top.
  5. From the list of enhancements, uncheck all of them, or click the Disable all enhancements checkbox.
  6. Click the OK button to save your changes and close the window.
  7. Click OK to close the Playback Devices window.

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