Audacity is an easy to use audio editing tool. Educators can use audacity to create and save voice lessons or podcasts that can be saved and used at a later time. Podcasts can also be saved and then downloaded from the internet. Audacity allows you to record, edit and modify your audio. Audacity allows you to add multiple tracks.
Audacity Basics: This link will take you to a Teachertube Video that is easy to understand. http://www.teachertube.com/viewVideo.php?video_id=2510
audacity-basics[1].pdf Here is a very useful guide to help familiarize you with how audacity works.
audacity-quickstart[1].pdf Here is another great tool to refer to as you learn about audacity.
What_is_Podcasting[1].pdf Here is a great definition of what a podcast it.