The easiest thing to do is to use the Save as Web Page option to save it
as a .htm file (not a .mht file). This will create a folder with all the
media elements from the file. Dig through that folder and look for your
WAV file.
--David
--
David M. Marcovitz
Author of _Powerful PowerPoint for Educators_ http://www.PowerfulPowerPoint.com/
Microsoft PowerPoint MVP
Associate Professor, Loyola University Maryland