load-parametric-eq-pulseaudio.sh

#!/bin/bash

#----------------------------------------------------------------------------------
# Settings
#----------------------------------------------------------------------------------

#BANDN="Toggle,Freq,Band,Gain"
BAND1="1,150,1.3,-7"
BAND2="1,100,0.4,4"
BAND3="1,5400,0.9,-5"
BAND4="1,3400,1.5,3"

#EQ="Toggle,Gain,Bands"
EQ="1,0,$BAND1,$BAND2,$BAND3,$BAND4"

#----------------------------------------------------------------------------------
# Code
#----------------------------------------------------------------------------------

function getname {
  pactl list short $1 | grep $2 | awk '{print $2}'
}

function getid {
  pactl list short $1 | grep $2 | awk '{print $1}'
}



for existing_eq in `getid modules paraeq`
do
    echo "Unloading existing EQ"
    pactl unload-module $existing_eq
done

for existing_bt in `getid modules loopback.*bluez`
do
    echo "Disconnecting bluetooth from master output"
    pactl unload-module $existing_bt
done

OUT=`getname sinks alsa`
pactl load-module module-ladspa-sink sink_name=paraeq master=$OUT plugin=filters label=Parametric1 control=$EQ

INP=`getname sources bluez`
OUTEQ=`getname sinks paraeq`

pactl load-module module-loopback source=$INP sink=$OUTEQ

Hi there, I have been trying to run a system-wide parametric equalizer for some time, but I'm pretty new in Linux. I believe that your script can help me out, I try to run it, but I get Failure: Module initialization failed.

Hey, thanks a lot, I implemented the eq. Do you know where I can read more about this particular filter? I don't know with precision the interaction between toggle/frequency and band.

You should look into pulseeffects, a much more elaborate parametric EQ with a GUI :)