Record Better Narration
http://www.allbusiness.com/services/business-services-advertising/4247358-1.html

Fisher, Jeffrey P.
Presentations
2003

Abstract:

Though most presentations are delivered live, sometimes you need a prerecorded segment to use as narration for a video or a PowerPoint slideshow. If sound quality is your primary concern, it's best to use a professional sound studio. But if time and budget concerns are also part of the equation, it's possible to create high-quality narration yourself by adding some inexpensive recording equipment and software to your computer and following some basic recording guidelines. Assuming you already have a computer with a sound card (which acts as a digital recorder), what other gear do you need?