O Pulseaudio suporta alguns plugins LADSPA.
sudo aptitude install rlwrap swh-plugins
rlwrap pacmd
# equalizer
load-module module-ladspa-sink sink_name=ladspa_out plugin=mbeq_1197 label=mbeq control=11.621622,10,4.594594,2.702703,0,0,-1.621622,-0.270270,-5.405406,-3.513514,-8.648648,-5.675676,-4.054054,1.351351,9.189189
# volume compression
load-module module-ladspa-sink sink_name=sc4m plugin=sc4m_1916 label=sc4m control=1,1.5,401,-30,20,5,12
set-default-sink sc4m