Microsoft KB Archive/289226

= No Sound from Non-PCM File with Windows Driver Model Audio Drivers =

Article ID: 289226

Article Last Modified on 1/31/2007

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APPLIES TO


 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Service Pack 1

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This article was previously published under Q289226



SYMPTOMS
When you try to play a non-PCM (Pulse Code Modulation) WAV audio file on a Windows 2000 computer with WDM (Windows Driver Model) audio drivers installed, no sound is produced.



CAUSE
This behavior occurs because the Wdmaud.drv (WDM Audio Driver Mapper) file interfaces with Kmixer.sys (Kernel Mode Audio Mixer), which supports only the PCM audio format.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack



WORKAROUND
To work around this behavior, install non-WDM drivers for your audio device.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Windows 2000.

This problem was first corrected in Windows 2000 Service Pack 2.



MORE INFORMATION
Devices such as software-based DVD players require the use of non-PCM audio formats to play content like AC3 (Dolby Digital 5.1) audio.

Additional query words: encode movie

Keywords: kbbug kbfix kbwin2000presp2fix kbsound KB289226

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