Recording quality is poor when you use a USB microphone on a Windows Vista-based computer that has 4 GB of RAM or more

This article has been archived. It is offered "as is" and will no longer be updated.
When you record audio by using a USB microphone on a computer that is running a 64-bit version of Windows Vista, you may find that the quality of the recording is poor. There may be gaps or pauses in the recording. This problem occurs on a computer that is using 4 gigabytes (GB) of RAM or more.

Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack

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 this specific problem. 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: 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.

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, x86-based versions
File nameFile versionFile sizeDateTimePlatform
Update.mumNot Applicable2,03015-Mar-200710:43Not Applicable
Usbd.sys6.0.6000.205575,88815-Mar-200700:59Not Applicable
X86_usbport.inf_31bf3856ad364e35_6.0.6000.20557_none_bc36ac361fa6f2f7.manifestNot Applicable5,38615-Mar-200710:44Not Applicable
Windows Vista, 64-bit versions
File nameFile versionFile sizeDateTimePlatform
Amd64_usbport.inf_31bf3856ad364e35_6.0.6000.20557_none_185547b9d804642d.manifestNot Applicable5,38815-Mar-200710:50Not Applicable
Update.mumNot Applicable2,03015-Mar-200710:43Not Applicable

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.
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
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 933433 - Last Review: 01/16/2015 09:28:46 - Revision: 1.0

  • Windows Vista Business 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
  • kbnosurvey kbarchive kbautohotfix kbvistasp1fix kbfix kbhotfixserver kbqfe kbexpertiseinter kbwinvistapostrtmfix KB933433