Audacity
Free, open-source and multiplatform audio editing software
https://www.audacityteam.org/
Let’s Make Music (LMMS)
Want to make music? Complex with DAW capacity, and fully Open Source.
https://lmms.io/
WavePad
Solid audio editor for Mac!
https://www.nch.com.au/wavepad/index.html
Reaper
Low-cost, full-feature audio creation suite. Go wild.
https://www.reaper.fm/
