alsa equalizer & loudnorm?

sudo apt install libasound2-plugin-equal
# reboot

in ~/.asoundrc

pcm.!default {
        type plug;
        slave.pcm "plugequal";
ctl.equal {
    type equal;
pcm.plugequal {
    type equal;
    slave.pcm "plug:dmix";

start eq gui with

alsamixer -D equal -g
# -g is for colorless
# or for instant gui
# urxvt -e alsamixer -D equal -g < loudnorm plugin in ffmpeg < vlevel plugin using LADSPA

The actual alsa loudnorm implementation?