• intro
• github
• colab

• sudo apt-get install pulseaudio-equalizer

• start with qpaeq
• If this gives you

There was an error connecting to pulseaudio,
please make sure you have the pulseaudio dbus module loaded, exiting...

then load these two modules using pactl:

• pactl load-module module-equalizer-sink
• pactl load-module module-dbus-protocol
• To make these changes permanent
  • edit ~/.config/pulse/default.pa (create it if necessary) and add these lines:
  • load-module module-equalizer-sink
  • load-module module-dbus-protocol

from https://askubuntu.com/questions/980876/how-do-i-start-pulseaudio-equalizer