WTF is vlevel?
A vlevel filter normalises the audio volume of an input source. About vlevel
Append to /etc/pulse/default.pa
Ensure that everything is loaded correcly
pavucontrol and you should find “LADSPA Plugin VLevel” as a new sink. Link everything you want to be normalized by the filter through that sink. You also have a new LADSPA Stream now! Link it to your usually used output sink.
Its only for music!
It adds a noticeable delay to the audio so dont run video streams through it.