Microsoft KB Archive/280127

= Windows Incorrectly Displays Hardware that Supports Multiple Input Devices =

Article ID: 280127

Article Last Modified on 10/18/2005

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APPLIES TO


 * Microsoft Windows Millennium Edition

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This article was previously published under Q280127



SYMPTOMS
When you use a computer running Windows Millennium Edition (Me) and you have Universal Serial Bus (USB) audio devices installed, such as a USB headset and USB amplified speakers, you may not be able to accurately select the recording or playback device that you want on the volume control (Sndvol32.exe), which can have one or more of the following behaviors:
 * After you install the audio device and restart your computer, the CD volume control may be missing.
 * The slider may not be displayed with the correct name if you have a USB audio device that requires an input selector. If there is more than one input selector, both input selectors are displayed with the same name, &quot;USB Audio Device&quot;, on the volume control. When you select one input selector, both input selectors are selected.
 * Hardware that supports full-duplex record and playback may not be displayed correctly. The recording options, LINE IN and MIC IN, are displayed as &quot;USB Audio Device&quot;, and you cannot select either of the input selectors. The master volume for playback is displayed as &quot;USB Audio Device&quot;.



CAUSE
The volume control cannot differentiate between inputs with duplicate node names.



RESOLUTION
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.

The English-language version of this fix should have the following file attributes or later:   Date      Time       Version      Size     File name     Operating system ---  1/5/2001  8:52:39pm  4.90.0.3001  147,840  Kmixer.sys    Windows Me   1/5/2001  8:52:40pm  4.90.0.3001   24,496  Rt.sys        Windows Me   1/5/2001  8:52:40pm  4.90.3001.0   51,344  Usbaudio.sys  Windows Me   1/5/2001  8:52:40pm  4.90.0.3001  100,208  Wdmaud.sys    Windows Me



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
For additional information about Windows Me hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

295413 General Information About Windows Millennium Edition Hotfixes

Additional query words: kmixer rt usbaudio wdmaudio 280127usam

Keywords: kbhotfixserver kbqfe kbbug kbfix kbhardware kbqfe KB280127

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