Pulseeffects is an audio effects for Pulseaudio applications. 

https://github.com/wwmm/pulseeffects

The current dependencies and recommendations of Pulseeffects does not include
packages that would enable most of the functionalities.

The currently missing functionalities are

limiter
compressor
filter
equalizer
reverb
bass enhancer
exciter
maximizer
mutiband compressor
loudness
gate
pitch
multiband gate
deesser
stereo tools
delay

To enable it, the following packagess must be include as recommended packages

lsp-plugins (https://github.com/sadko4u/lsp-plugins)
lsp-plugins-jack
lsp-plugins-ladspa
lsp-plugins-lv2
lsp-plugins-vst
calf (found in packman)
lv2-calf (found in packman)
zam-plugins (https://github.com/zamaudio/zam-plugins)
mda-lv2 (https://drobilla.net/software/mda-lv2)