System Wide DSP (Equalizer)

Hello there,

I’ve been interested in applying a system wide eq lately, both to improve the audio coming out of my not-so-good speakers and to learn a bit about how linux handles audio, I was not satisfied with pulseaudio-equalizer-ladspa because I wanted to be able to choose the frequency and the quality-factor of the filters, so I tried following this guide, but it seems like I’m doing something wrong. I’ll go trough what I did step by step:

  1. I cloned and installed Everything seems fine.

  2. I created a configuration file ~/.config/ladspa_dsp/config_<plugin_name>. Everything seems fine.

  3. I made PulseAudio load the plugin using
    $ pacmd load-module module-ladspa-sink sink_name=dsp master=alsa_card.usb-Yamaha_Corporation_Steinberg_UR12-00 plugin=ladspa_dsp:<plugin_name> label=ladspa_dsp:<plugin_name>
    Nothing seems to have happened.

All of that didn’t seem to have any noticeable effect, so I thought that maybe my eq configuration was too subtle for me to notice the difference, but after trying again with totally crazy eq settings I am sure the problem is not in my ears.
I am also pretty sure the problem is in point 3 of the above list because the configuration file seems to be ok since the plugin gets listed with the correct name when I issue the command $ analyseplugin ~/Audio/dsp/ .
Can you give me some hints on how to get unstuck?
Not sure if it’s relevant but I run linux58 kernel, Manjaro Mikah 20.1 and Plasma KDE, at the moment I’m using a Steinberg UR12 audio interface.

Thanks in advance.

According to the Arch Documentation (of which Manjaro is a derivative) you also have to

pactl load-module module-dbus-protocol

Which seems to be missing from your guide.

Could you follow the Arch docs and report back, please?



That is the card name not the sink name

use this command to get list of sink names

pactl list sinks | grep -A3 Sink

According to this - Problems installing DSP correction -
the dsp configuration file should just be called config - ~/.config/ladspa_dsp/config

then use pacmd options for ‘plugin’ and ‘label’ are as shown in the guide - plugin=ladspa_dsp label=ladspa_dsp

and use this command to set the the default sink

pacmd set-default-sink dsp
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Thanks for your answers, I’ll let you know if it works as soon as I can

Hey lollo,

I came across this thread on the same journey. Investing in some good headphones, and would be like to correct with a parametric. I was able to get a parametric eq working system wide with the below, took some installation of some missing things I didn’t have installed in my Manjaro install, but got it working, and it’s working nicely.

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