Audacity is a great open-source application for editing audio files.
Whether you're capturing old cassette tapes or editing recordings from a digital recorder, this freebie is just the ticket.
Here are a few resources to help make the best of it;
- Audacity Manual: Editing an Existing File
- MakeUseOf: 10 Creative Uses for Audacity
- How To Use Audacity- Basics – YouTube
- How To Make MP3 Mobile Ringtones With Audacity
- How To Remove Ambient Noise From Your Audio Files Using Audacity