Depois de instalar o pulseaudio-equalizer, ele não parece estar ligado a pulseaudio
~/.config/pulse/default.pa
foi inspirado em aqui
#include system-wise config
.include /etc/pulse/default.pa
#compressor -- for normalize audio volume
.ifexists module-ladspa-sink.so
.nofail
### BEGIN: Equalized audio configuration
### Generated from: pulseaudio-equalizer
load-module module-ladspa-sink sink_name=ladspa_output.compressed master=alsa_output.pci-0000_00_1b.0.analog-stereo plugin=sc1_1425.so label=sc1 control=101,401,-24,3,5,9.6
load-module module-ladspa-sink sink_name=ladspa_output.equalized master=ladspa_output.compressed plugin=mbeq_1197 label=mbeq control=0.0,-2.0,-2.0,-4.0,-4.0,-2.0,4.0,6.0,7.5,7.5,7.5,7.5,4.0,2.0,0.0
load-module module-ladspa-sink sink_name=ladspa_output.normalized master=ladspa_output.equalized plugin=fast_lookahead_limiter_1913 label=fastLookaheadLimiter control=15,0,0.8
set-default-sink alsa_output.pci-0000_00_1b.0.analog-stereo
set-sink-volume alsa_output.pci-0000_00_1b.0.analog-stereo 65536
set-sink-mute alsa_output.pci-0000_00_1b.0.analog-stereo 0
load-module module-equalizer-sink
load-module module-dbus-protocol
set-default-sink alsa_output.pci-0000_00_1b.0.analog-stereo
### END: Equalized audio configuration
.fail
.endif
###use the below pactl command for alsa card should be one w/o .monitor###
### pactl list | grep -A2 'Source #' | grep 'Name: ' | cut -d" " -f2 ###
### pacmd list-sinks | sed -n "/^.*name:/s/.*<\(.*\)>.*//p" ###
### pulseaudio -k <<< kill pulseaudio, it will restart ###
pacmd list-sources | grep -e 'name:' -e 'index'
index: 0
name: <alsa_output.pci-0000_00_03.0.hdmi-stereo-extra1.monitor>
index: 1
name: <alsa_output.pci-0000_00_1b.0.analog-stereo.monitor>
* index: 2
name: <alsa_input.pci-0000_00_1b.0.analog-stereo>
index: 3
name: <alsa_output.pci-0000_00_1b.0.analog-stereo.equalizer.monitor>