I'm trying to record sound in PowerPoint 2010 but it comes out very poor. I read a recommendation to set up the audio parameters in PowerPoint 2007, save the file, and then open the file and record sound in PowerPoint 2010. Surprisingly, they say, the good audio parameters set in PP2007 persist in PP2010. Unfortunately, I don't have PP2007. I also tried changing parameters through the control panel (I work under Windows XP) but no luck with that either. Is there any other way to improve the sound quality in PowerPoint 2010?