Audacity is a free, easy-to-use audio editor and recorder. Audacity allows you to open audio files from a digital recorder or import them from CDs. It allows you to cut, copy, paste and edit audio along a timeline. You can add multiple tracks and a range of effects like normalize volume levels across a selection or an entire file, fade regions of the file in or out, pan the sound from left to right and much more. If you want to get into making audio pieces for podcasting or radio Audacity is a great place to start.