The following is a list of free audio and music editors available online. It is by no means exhaustive! I will add to it as I come across new things (or at least things that are new to me). And I’ll try to delete anything that gets out of date.
Downloadable Free Audio and Music Editors
Audacity is a free audio and music editor which is open-source and easy to use. It can also be used to record live audio too. Audacity can convert tapes and records (remember them??) to computer or CD. It can also edit sound files; for example, you can cut, copy, splice or mix sounds together, or split recordings into separate tracks. It also allows you to add effects – for example changing the speed or pitch of a recording. It and has been used to record and mix entire albums. You can even use it to create ringtones!! It is available for Windows, Mac and Linux.
Ocenaudio is designed “for people who need to edit and analyse audio files without complications”. As such, it is a lovely, free, fast, easy-to-use audio editor for Windows, although it lacks some advanced features. With Ocenaudio you can even select multiple parts of a track and apply the same effect to them all. Effects include silence (!), fades, removing background noise and changing pitch.
Wavepad is a free audio and music editor for Windows and Mac that is extremely simple to use. You can record and edit music, voice and other audio recordings. When editing, you can cut, copy and paste parts of recordings, then add effects (e.g. echo, amplification or noise reduction.) WavePad supports WAV and MP3 files, plus other formats (including VOX, GSM, WMA, real audio, AU, AIF, FLAC, OGG and more.)
Ashampoo Music Studio
Ashampoo Music Studio is a free audio editor for Windows. It has an easy-to-use interface, so it’s good for beginners working with simple (single track) audio clips. It can be used to convert files to different audio formats, as well as rip and burn CDs.
A free audio recorder and sound editor for voice, music and video available for both Android and iOS. You can even record in other apps and import the file into Dolby On to edit and enhance your recording. Can easily share your creations on social channels, send to collaborators, export lossless audio, or even livestream to Facebook.
Free Online Audio and Music Editors
Audiotool can be used in Chrome or Firefox running on Windows, Mac or Linux. You can use the music you create with Audiotool commercially, as long as you have the permission of any contributors and you know the origin of any samples used.
Free Audio Converter
fre:ac is a free audio converter and CD ripper with support for most popular formats and encoders. It converts easily between MP3, M4A/AAC, FLAC, WMA, Opus, Ogg Vorbis, Speex, Monkey’s Audio (APE), WavPack, WAV and other formats. To convert a file, simply drag your files into the fre:ac window, select your required output format, then click on the Play button. Fre:ac is also available as a Windows app at the Microsoft Store (but only works on Windows 10).
Note: please read the disclaimer before downloading / using any software.