Install sc3-plugins-language by entering the following commands in the terminal:
sudo apt update sudo apt install sc3-plugins-language
Description:
sclang class files of UGen plugins for SuperCollider
Extension plugins for the SuperCollider3 audio synthesis server. These SuperCollider class files are needed by sclang when using the community collection of UGen plugins for SuperCollider.
Homepage: https://github.com/supercollider/sc3-plugins
Version: 3.7.1~repack-2
Section: universe/sound