Microsoft KB Archive/818210

= FIX: The right channel on a USB audio device returns to the default volume level after the computer resumes from stand by mode =

Article ID: 818210

Article Last Modified on 10/19/2005

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
After the computer resumes from being in stand by mode, the audio level of the right channel on a USB audio device may not be restored to the correct value.

To reproduce the problem, follow these steps:
 * 1) Set the volume level of both the right channel and the left channel to zero by using the Sndvol32.exe mixer tool.
 * 2) Put the computer in Stand by mode. To do this, click Start, click Shut Down, and then click Stand by.
 * 3) Resume the computer.
 * 4) Play some audio content.

The right channel is at full volume. The left channel is silent as expected.



CAUSE
This problem occurs because the Usbaudio.sys driver does not restore the cached volume level for the right audio channel.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

File information
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version            Size    File name --  28-Apr-2003  17:19  5.0.2195.6741      68,944  Usbaudio.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New naming schema for Microsoft Windows software update packages

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional query words: mute unmute

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe kbwin2000presp5fix KB818210

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