Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac, GNU/Linux and other operating systems.
Audacity is free software, developed by a group of volunteers and distributed under the GNU General Public License (GPL). Programs like Audacity are also called open source software, because their source code is available for anyone to study or use.
Features
Record live audioRecord computer playback on any Windows Vista or later machine
Convert tapes and records into digital recordings or CDs
Edit WAV, AIFF, FLAC, MP2, MP3 or Ogg Vorbis sound files
AC3, M4A/M4R (AAC), WMA and other formats supported using optional libraries
Cut, copy, splice or mix sounds together
Numerous effects including change the speed or pitch of a recording
...and much more!
Visit the website: https://www.audacityteam.org/
An alternative open-source (free) software to compare with Audacity would be OBS studio.