Install calf-ladspa by entering the following commands in the terminal:
sudo apt update sudo apt install calf-ladspa
Linux Multimedia Studio - Calf LADSPA plugins
Calf is a pack of audio plugins - effects and instruments. The goal is to create a set of plugins using decent algorithms and parameter settings, available in a form which is compatible with as many open source applications as possible. . These plugins are distributed as part of Linux Multimedia Studio, but may be used by other applications.