Splitting recordings into separate tracks
From Audacity Wiki
|If you have a vinyl or cassette recording with separate tracks on it, you most likely want to export those tracks as separate audio files for your computer's music library, or so you can burn them to separate tracks on an audio CD. This is easily accomplished in Audacity, using labels and the Export Multiple function.
If you need to use a legacy version of Audacity, instructions for track splitting can be found on the main Audacity site's FAQ page.