Debian and Linux Mint “Debian” users can use repository at OpenSUSE Build Service.
Open up a terminal and input these commands:
echo "deb http://download.opensuse.org/repositories/home:/Sokoloff/Debian_11 ./" | sudo tee /etc/apt/sources.list.d/flacon.list
wget http://download.opensuse.org/repositories/home:/Sokoloff/Debian_11/Release.key -O- | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/flacon.gpg
sudo apt-get update
sudo apt-get install flacon
echo "deb http://download.opensuse.org/repositories/home:/Sokoloff/Debian_10 ./" | sudo tee /etc/apt/sources.list.d/flacon.list
wget http://download.opensuse.org/repositories/home:/Sokoloff/Debian_10/Release.key -O- | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/flacon.gpg
sudo apt-get update
sudo apt-get install flacon