A hotfix rollup for the USB audio driver is available for Windows Vista-based and Windows Server 2008-based computers

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Article ID: 944681 - View products that this article applies to.
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SUMMARY

This article describes a hotfix rollup for the USB audio driver, Usbaudio.sys, for Windows Vista-based and Windows Server 2008-based computers. This hotfix rollup fixes several problems and provides some improvements for the USB audio driver.

This hotfix rollup fixes the following problems:
  • Some legacy USB MIDI devices do not appear in Windows Vista or in Windows Server 2008. These USB MIDI devices correctly appear in Windows XP.
  • Some USB Audio devices display incorrect device names.
  • In a USB Audio device, you cannot select the output source of a multiplexer (MUX) processing unit.
  • A USB Audio device does not log to the same location as the Audio engine does.
  • Surprise removal of a USB Audio device causes an application to stop responding or to use 100% of the CPU.
  • The USB Audio driver incorrectly maps the center frequency to an incorrect value.
  • The USB Audio driver cannot set a specific mode for a processing unit node.
This hotfix rollup includes the following improvements:
  • The USB Bus drive can store a device startup failure.
  • The USB device can save and restore the MIDI Processing Unit (MPU) state.
  • The USB Audio driver can lock the AVStream queue on entry to standby or on exit from standby.
  • The process for determining whether a USB Audio device is a communications device has been refined.

MORE INFORMATION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix, the computer must run one of the following operating systems:
  • Windows Vista
  • Windows Vista SP1
  • Windows Server 2008

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

File information

The English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.

Windows Vista and Windows Server 2008 file information notes

  • The files that apply to a specific product, milestone (RTM, SPn) can be identified by examining the file version numbers as shown in the following table:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.0.6000.20xxx Windows RTM LDR
    6.0.6001.22xxx Windows Vista SP1 and Windows Server 2008 SP1 SP1 LDR
  • Service Pack 1 is integrated into Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
  • The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are listed separately . MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.
For all supported 32-it versions of Windows Server 2008 and of Windows Vista
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File nameFile versionFile sizeDateTimePlatform
Usbaudio.sys6.0.6000.2076672,96006-Feb-200802:11Not Applicable
Usbaudio.sys6.0.6001.2210873,08806-Feb-200802:12Not Applicable
For all supported 64-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Usbaudio.sys6.0.6000.2076698,81606-Feb-200802:30x64
Usbaudio.sys6.0.6001.2210898,81606-Feb-200802:50x64
For all supported Itanium-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Usbaudio.sys6.0.6001.22108236,80006-Feb-200802:40Not Applicable

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more 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 file information for Windows Server 2008 and for Windows Vista

Additional files for all supported 32-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File namePackage_for_kb944681_client_0~31bf3856ad364e35~x86~~6.0.2.0.mum
File versionNot Applicable
File size1,425
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_client_1~31bf3856ad364e35~x86~~6.0.2.0.mum
File versionNot Applicable
File size1,367
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_client~31bf3856ad364e35~x86~~6.0.2.0.mum
File versionNot Applicable
File size1,711
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_server_0~31bf3856ad364e35~x86~~6.0.2.0.mum
File versionNot Applicable
File size1,425
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_server~31bf3856ad364e35~x86~~6.0.2.0.mum
File versionNot Applicable
File size1,430
Date (UTC)06-Feb-2008
Time (UTC)18:26
File nameX86_wdma_usb.inf_31bf3856ad364e35_6.0.6000.20766_none_6b805bfad2fd33ea.manifest
File versionNot Applicable
File size1,881
Date (UTC)06-Feb-2008
Time (UTC)18:32
File nameX86_wdma_usb.inf_31bf3856ad364e35_6.0.6001.22108_none_6da97abccff14fe3.manifest
File versionNot Applicable
File size1,881
Date (UTC)06-Feb-2008
Time (UTC)18:32
Additional files for all supported 64-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameAmd64_wdma_usb.inf_31bf3856ad364e35_6.0.6000.20766_none_c79ef77e8b5aa520.manifest
File versionNot Applicable
File size1,883
Date (UTC)06-Feb-2008
Time (UTC)18:34
File nameAmd64_wdma_usb.inf_31bf3856ad364e35_6.0.6001.22108_none_c9c81640884ec119.manifest
File versionNot Applicable
File size1,883
Date (UTC)06-Feb-2008
Time (UTC)18:34
File namePackage_for_kb944681_client_0~31bf3856ad364e35~amd64~~6.0.2.0.mum
File versionNot Applicable
File size1,433
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_client_1~31bf3856ad364e35~amd64~~6.0.2.0.mum
File versionNot Applicable
File size1,375
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_client~31bf3856ad364e35~amd64~~6.0.2.0.mum
File versionNot Applicable
File size1,721
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_server_0~31bf3856ad364e35~amd64~~6.0.2.0.mum
File versionNot Applicable
File size1,433
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_server~31bf3856ad364e35~amd64~~6.0.2.0.mum
File versionNot Applicable
File size1,438
Date (UTC)06-Feb-2008
Time (UTC)18:26
Additional files for all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_wdma_usb.inf_31bf3856ad364e35_6.0.6001.22108_none_6dab1eb2cfef58df.manifest
File versionNot Applicable
File size1,882
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_server_0~31bf3856ad364e35~ia64~~6.0.2.0.mum
File versionNot Applicable
File size1,429
Date (UTC)06-Feb-2008
Time (UTC)18:26
File namePackage_for_kb944681_server~31bf3856ad364e35~ia64~~6.0.2.0.mum
File versionNot Applicable
File size1,434
Date (UTC)06-Feb-2008
Time (UTC)18:26

Properties

Article ID: 944681 - Last Review: October 8, 2011 - Revision: 2.0
APPLIES TO
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Business
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
Keywords: 
kbautohotfix kbexpertisebeginner kbfix kbqfe kbHotfixServer KB944681

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