FIX: You may not hear the end of an audio file when you play the audio file on a computer that is running Windows Vista

Consider the following scenario:

• On a computer that is running Windows Vista, you play an audio file.
• The playback application uses Media Foundation to render the audio.
• The last part of the audio file contains distinguishable audio.

In this scenario, you may not hear the end of the audio file. For example, you may not hear the last third of a second of the audio file.

The end-of-stream message is sent to the sound device before the actual end of the rendering of the audio file.

Update information

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

To resolve this problem, obtain the update from the Microsoft Download Center.

Download information

The following files are available for download from the Microsoft Download Center:

Windows Vista, 32-bit versions

Download the Windows6.0-KB960553-x86.msu package now. (http://download.microsoft.com/download/F/5/6/F5641F76-FE15-4BEB-9934-B3F5DED0898F/Windows6.0-KB960553-x86.msu)

Windows Vista, 64-bit versions

Download the Windows6.0-KB960553-x64.msu package now. (http://download.microsoft.com/download/F/5/6/F5641F76-FE15-4BEB-9934-B3F5DED0898F/Windows6.0-KB960553-x64.msu)

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to restart the computer after you apply this update.

Update replacement information

This update does not replace any previous updates.

File information

The global version of this update 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.

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

Microsoft Windows Media Player uses Media Foundation for audio playback of files that are on the local hard disk. Therefore, Windows Media Player is an example of an application in which this problem may occur.

Steps to reproduce the problem

1. Create a three-second spoken word audio file, and then save the file on the desktop.
2. In Windows Media Player, open the file.
3. Play the file to the end, and pay additional attention to the last half-second of audio.