In your Custom Animation Task pane, click the drop down menu that
corresponds to your sound. Click Effect Options. Select the Effects Tab.
Select "Stop Playing" then enter the number of slides after which you would
like your sound to stop.
--
Kathryn Jacobs, Microsoft MVP PowerPoint and OneNote
Author of Kathy Jacobs on PowerPoint - Available now from Holy Macro! Books
Get PowerPoint answers at http://www.powerpointanswers.com
I believe life is meant to be lived. But:
if we live without making a difference, it makes no difference that we lived