I just installed pulseaudio-equalizer on my Ubuntu 17.10 following the answer here with:

sudo apt-get install pulseaudio-equalizer

When I want to start the application I get:

$ pulseaudio
E: [pulseaudio] pid.c: Daemon already running.
E: [pulseaudio] main.c: pa_pid_file_create() failed.

How can I start pulseaudio-equalizer?


To start the pulseaudio equalizer run:


If this gives you the error

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

and, 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
  • 2
    Thanks. However, I think there was a different error now. louie@rootplex:~$ qpaeq Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway. It seems that running pulseaudio does not support equalizer features and loading module-equalizer-sink module failed. – Louie Miranda Jun 11 '20 at 5:43
  • 1
    @LouieMiranda To me this just looks like a warning for wayland users (which you obviously are) – try starting it with: QT_QPA_PLATFORM=wayland qpaeq – dessert Jun 11 '20 at 8:48

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