Default Audio Endpoint Selection in Windows 7

Updated: March 30, 2010

File name: W7-DefAudioEndptSel.docx
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The Windows 7 audio subsystem uses an algorithm with enhanced heuristics for default audio endpoint selection. This paper describes these heuristics and how the Windows 7 audio subsystem uses them to select the default audio endpoint. For you to best understand the new Windows 7 selection mechanism, this paper also explains how default audio endpoint selection occurs in Windows Vista. The target audience of this paper is OEMs and IHVs.

For further information, contact: uaa@microsoft.com

This information applies for the Windows 7 operating system.

Included in this white paper:

• Basic Algorithm for Default Audio Endpoint Selection

• The Endpoint TimeStamp Property

• The Windows Vista Default Audio Endpoint Heuristic

• The Windows 7 Default Audio Endpoint Heuristic

• Windows 7 Inbox Heuristic Settings

• Windows 7 OEM Heuristics Customization