Hi Henry,
If you're referring to the dictation feature provided in Office 2000, 2002/XP and 2003, then usually only if it's a recording of
your voice after the app has been trained to recognize it on the particular machine.
There are some 3rd party products,
http://nuance.com among them , that do support this type of activity.
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Can I input a sound file into speech recognition?>>
--
Bob Buckland ?
MS Office System Products MVP
*Courtesy is not expensive and can pay big dividends*