Open the terminal using "Ctrl + Alt + t" and copy paste the following:
sudo add-apt-repository ppa:audio-recorder/ppa
sudo apt-get -y update
sudo apt-get install audio-recorder
This works for Ubuntu 15.x, 16.x, 17.x, 18.x, 19.x, 20.x, 21.x and 22.x and Linux Mint 18.x - 20.x.
Search and open "Audio Recorder".
