Audacity is a great start if you're just getting into audio editing.

The great thing about Audacity is that it is free - it is open source software and can be obtained as a free download.

It is a simple straighforward editor with limited capabilty but can get you through basic waveform editing.

For elementary projects you can't really go wrong and there are software updates from time to time.

To find out more about Audacity go to:

audacity.sourceforge.net/