Cause: The document was opened in an earlier version of Word or in any Windows version of Word.
Solution: Export the recorded audio as a separate file for use in other programs.
On the View menu, click Notebook Layout.
On the Tools menu, point to Audio Notes, and then click Export Audio.
Note: Word exports audio files in .mp4 format, which most audio programs on the Mac OS and Windows can read. Word can also export audio files in .aiff or .wav format.