What is the DAU file format?
A file with the .DAU extension is a file known as Express Dictate Dictate Record. It belongs to the Audio Files category. This format is associated with NCH Software Pty Ltd.
The reliable way to open a .DAU file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .DAU files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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