Audacity is free, open source software for recording and editing sounds. You can use Audacity to record live audio, convert tapes and records, edit sound files, change the speed or pitch of a recording and much more.
Audacity vs Sound Forge opinions
Very powerful, like Sound Forge, but its interface is quite messy and not user-friendly
I've recorded many CDs with Audacity and it's so far the best audio editor for me so far
Excellent open source audio editor with 20+ years development history. The interface may look a bit primitive, but it is both easy to use and very powerful. The "warning" about spyware is nonsense.
Free-Portable-Easy to use.
It has so many things that Soundforge has, it has excellent output quality and many tools
Tenacity is an easy-to-use, privacy-friendly, FLOSS, cross-platform multi-track audio editor/recorder for Windows, macOS, Linux and other operating systems.Discontinued
The project is currently on an indefinite hiatus. Tenacity will probably merge with Saucedacity : https://github.com/tenacityteam/tenacity/discussions/733
Saucedacity is a free, open source audio editor based on Audacity with the same features and the same project format, but without the autoupdater and telemetry that originally came with Audacity.
DarkAudacity is a build/fork of the the well known free sound editor, Audacity, customized with a darker, more modern theme - and a few small tweaks. The audio engine underneath is the same audio engine. The same code powers it. Like Audacity, it is completely free.Discontinued
The project seems no longer developed since 2019. Last version, 2.3.2, released in May 2019, can be still downloaded from FossHub. The GitHub page shows an older version (2.1.3) that dates back to 2016.
Kwave is a sound editor designed for the KDE Desktop Environment.
With Kwave you can record, play back, import and edit many sorts of audio files including multi-channel files. Kwave includes some plugins to transform audio files in several ways and presents a graphical view wit.
Audacium is an easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. Developed by a group of volunteers as open source.
AudioMass lets you record, or use your existing audio tracks, and modify them by trimming, cutting, pasting or applying a plethora of effects, from compression and paragraphic equalizers to reverb, delay and distortion fx.
Sneedacity (named after Sneed's Feed and Seed from The Simpsons episode, "E-I-E-I-D'oh") is a free (libre), open source, and privacy-respecting audio recording and editing suite forked from Audacity.
WaveShop is a free, open-source audio editor for Windows XP/Vista/7. WaveShop is fast, lightweight, and bit-perfect, meaning samples aren't altered unless they need to be. Editing a portion of an audio file only affects that portion; the rest of the file is untouched.Discontinued
The program is no longer updated. Last version, 1.0.14, released in November 2013, can be still downloaded from the official website.