Apply Real-Time Audio Effects on Ubuntu with Easy Effects
As you may infer from the name, PulseEffects was built around and designed for PulseAudio. Most major Linux distributions have switched from PulseAudio to PipeWire for their audio handling.
Enter Easy Effects, a successor to PulseEffects that sports a modern GTK4 interface, and an expanded set of features that enable to function as a powerful audio effects processor for PipeWire applications. It offers an equalizer, limiter, and compressor (among others) and a built-in spectrum analyser.