There is only one file type that uses the .WWU extension:
Wwise Work Unit
XML file that represents a "Work Unit" in Wwise, a complete audio authoring tool designed for sound designers and audio programmers; an example of a Work Unit is a search query which finds sound objects that match the parameters of the query.
WWU files may be referenced by Wwise Project (.WPROJ) files. The workgroup feature of Wwise allows Work Units to be accessible by everyone in a development team.
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Updated: July 9, 2007