Install ladspa-sdk by entering the following commands in the terminal:
sudo apt update sudo apt install ladspa-sdk
Description:
sample tools for linux-audio-dev plugin architecture
LADSPA is a free standard specification for audio effect plugins. . Contains sample plugins, and analyseplugin, listplugin, applyplugin programs, and the ladspa.h, the LADSPA specification. . Please build-depend on this package if you need ladspa.h
Homepage: http://www.ladspa.org/
Version: 1.13-3ubuntu2
Section: universe/sound