For my students, I've posted this introductory video tutorial to basic recording and editing with the next best thing - Audacity. It's FREE software, almost every bit as powerful as a full-featured Adobe Audition version 1.5, and it's available for download at www.audacity.sourceforge.net/
Here's how to go about downloading Audacity version 1.2.6:
Now here's a short video tutorial on editing audio with Audacity:
For continued learning on Audacity download these handy guides to Audio Editing by Mindy McAdams, in Adobe Acrobat files (.pdf):
But wait! There's more! Transom.org, part website, part movement geared towards creating "New Public Radio" has a great tools section devoted to editing with Audacity. Click here: http://www.transom.org/tools/editing_mixing/200404.audacity.html
Read the basics about in this WikiPedia entry: http://en.wikipedia.org/wiki/Audacity
Another, more widely used, digital audio editing program is Adobe Audition, formerly known as Cool Edit. BBC Training has some excellent free online tutorials to this software, which must be purchased from Adobe.