[header] How to edit an mp3 file [title] Download your choice of audio editor. [step] Free open source editing software audacity is used in this example. Most other audio editors and daws have similar features and support for editing mp3 files. 
[substeps] Go to the audacity download page and click the operating system you are using to download the latest version of the software. Note: the latest beta release is best for the latest versions of most operating systems including windows 7, windows vista, and mac os x 10.6.