sudo apt install pulseaudio=1:8.0-0ubuntu3.1~xenial9 libpulse0=1:8.0-0ubuntu3.1~xenial9 pulseaudio-module-x11=1:8.0-0ubuntu3.1~xenial9 pulseaudio-utils=1:8.0-0ubuntu3.1~xenial9 libpulsedsp=1:8.0-0ubuntu3.1~xenial9