System-wide PulseAudio Effects software PulseEffects update includes a configurable number of equalizer bands

Pulse effect(The audio effect tool for PulseAudio) Recently updated to version 4.0, and version 4.0.4 was released in a subsequent bug fix version, introducing some new features, such as the option to change the number of its PulseAudio equalizer frequency bands, Or use a custom color spectrum.
PulseEffects allows multiple audio input and output effects to be used on the system (PulseAudio is required), including reverb, stereo enhancer, limiter, auto volume, and 30-band system-wide equalizer.

About 10 days ago, the application has been updated to version 4.0.0, and there have been 4 bug fixes since then, but until recently, the 4.x version was only available on FlatHub (the current version of Flathub is 4.0.2, so there are 2 later Bug fixes).
In version 4.0, PulseEffects uses a different preset format, which means users will have to create new presets. “I know this is bad, but it is necessary,” the PulseEffects developer mentioned. In addition, in version 4.0, PulseEffects has also been moved from Python to C++.
Changes in PulseEffects 4.0.x include:

  • The system-wide equalizer band number can be changed from the equalizer settings menu
  • Spectral colors can be changed.
  • Users can now change the order of effects in the left sidebar.
  • The new Calf Filter plug-in replaces the high-pass and low-pass filters of previous PulseEffects versions.
  • Removed the level meters for each application because they cause errors that developers cannot fix.
  • When trying to enable optional plug-ins that are not installed on the system, the application no longer crashes.
  • Fixed many potential memory leaks.
  • The default buffer value is increased from 100 ms to 200 ms, which should solve the noise problem of Bluetooth headset users. The buffer value can be changed from the main setup menu.
PulseEffects PulseAudio system-wide equalizer
Configurable number of equalizer bands
System-wide PulseAudio Effects software PulseEffects update includes a configurable number of equalizer bands
Configurable spectral colors

Download PulseEffects

Without some adjustments, by default, PulseEffects may not work in Ubuntu (and other Linux-based distributions such as Linux Mint) or KDE. For information on how to make it work, see this page.

To install PulseEffects as a Flatpak package, please follow Flatpak and FlatHub Quick Setup guide. Then search for PulseEffects in Ubuntu/Gnome Software and install it from there, or you can use the following command to install:

flatpak install flathub com.github.wwmm.pulseeffects

Like most Flatpak applications, PulseEffects will not use your current GTK theme, but it can be done by installing certain themes in Flathub. Please check this article for more information: How to get the Flatpak application to use the correct Gtk Theme.Update: PulseEffects now also has Ubuntu PPA (for Ubuntu 18.04 and 18.10). PPA has a newer version of PulseAudio (because PulseEffects recommends PulseAudio >= 12), so keep this in mind before adding PPA. Upgrading system software packages may cause problems! If possible, I suggest using FlatPak version of PulseEffects instead.
You can add PPA in Ubuntu 18.10 and Ubuntu 18.04 and Linux distributions based on Ubuntu 18.04 (such as Linux Mint 19, basic OS 5.0 Juno, etc.) and install PulseEffects using the following command:

sudo add-apt-repository ppa:mikhailnov/pulseeffects
sudo apt update
sudo apt install pulseeffects pulseaudio --install-recommends