Install libags-audio-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libags-audio-dev
Description:
Advanced Gtk+ Sequencer audio processing engine (Development files)
libags_audio is a tree based audio processing library built upon GObject and libags. It allows you to do audio processing supporting LADSPA, DSSI and Lv2 plugin support. Audio data is processed multi-threaded. . This package includes the needed header files to develop with Advanced Gtk+ Sequencer audio processing library.
Homepage: https://nongnu.org/gsequencer
Version: 1.4.24-1ubuntu2
Section: universe/libdevel