Should be doable in any Linux Distro using pulseaudio (which i think kubuntu does): wiht module-ladspa-sink you can apply arbitrary ladspa plugins to your strea

Should be doable in any Linux Distro using pulseaudio (which i think kubuntu does): wiht module-ladspa-sink you can apply arbitrary ladspa plugins to your stream, there are plenty. And i think alsa also hast native compression support, but not sure.