Audio playback and capture applications hang.

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Article ID: 979303 - View products that this article applies to.
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Source: Microsoft Support

RAPID PUBLISHING

RAPID PUBLISHING ARTICLES PROVIDE INFORMATION DIRECTLY FROM WITHIN THE MICROSOFT SUPPORT ORGANIZATION. THE INFORMATION CONTAINED HEREIN IS CREATED IN RESPONSE TO EMERGING OR UNIQUE TOPICS, OR IS INTENDED SUPPLEMENT OTHER KNOWLEDGE BASE INFORMATION.

Action



You run an application that performs audio playback and audio capture simultaneously. This is a typical scenario when your application is VoIP (Voice over Internet Protocol) software.

Result

The application often hangs.

Cause



WaveOut API on Windows 7 sometimes fails to process audio samples correctly when response of your audio device is slow.

There is a problem on how WaveOut API handles audio playback requests and audio capture requests submitted by your application.

Resolution

The fix for this bug is available in KB 981679:

981679 An application that captures and plays audio stops responding in Windows 7 or in Windows Server 2008 R2

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Properties

Article ID: 979303 - Last Review: September 4, 2012 - Revision: 2.0
Applies to
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
  • Windows 7 Ultimate N
  • Windows 7 Starter N
  • Windows 7 Professional N
  • Windows 7 Home Premium N
  • Windows 7 Enterprise N
Keywords: 
kbrapidpub kbnomt KB979303

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