The audio from a USB speaker is distorted after you connect an additional USB device to a Windows Vista-based computer

SYMPTOMS

Consider the following scenario. You connect a universal serial bus (USB) speaker to a Windows Vista-based computer. The audio sounds clear. Then, you connect another USB device to the computer. For example, this USB device may be a USB mouse, a USB keyboard, or a USB game controller. In this scenario, the audio from the USB speaker is now distorted. This problem occurs when the computer uses an Open Host Controller Interface (OHCI) controller.

RESOLUTION

Hotfix information

A supported hotfix is now 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 Windows Vista service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451 (http://go.microsoft.com/?linkid=6294451)

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites

No prerequisites are required.

Restart requirement

You must 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.

WORKAROUND

To work around this problem, remove the additional USB device, and then restart the computer.

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, visit the following USB Implementers Forum Web site:

http://www.usb.org/home (http://www.usb.org/home)

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.


APPLIES TO
Windows Vista Business
Windows Vista Enterprise
Windows Vista Home Basic
Windows Vista Home Premium
Windows Vista Ultimate
Windows Vista Business 64-bit Edition
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

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Microsoft Knowledge Base Article

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