Install libasound2-plugin-equal by entering the following commands in the terminal:
sudo apt update sudo apt install libasound2-plugin-equal
Description:
equalizer plugin for ALSA
Alsaequal is a real-time adjustable equalizer plugin for ALSA. It can be adjusted using an ALSA compatible mixer, like alsamixergui or alsamixer. . Alsaequal uses the Eq CAPS LADSPA Plugin for audio processing, actually alsaequal is a generic LADSPA plugin interface with real-time access to the LADSPA controls (the LADSPA plugin included with alsa doesn't allow for real-time controls) but it was developed for and only tested with Eq CAPS LADSPA plugin.
Homepage: http://www.thedigitalmachine.net/alsaequal.html
Version: 0.6-7
Section: universe/libs