Okay, the message seem irrelevant. I just had first start the equalizer and then...
Module module-combine-sink not loaded.
I managed to install it using: dpkg-deb -R fs2-equaliser_1.5.0_all.deb unpacked sed...
Here are the depencencies that I found in fs2-equaliser_1.5.0_all.deb: Depends: python...
python-wxgtk2.8 required, but Ubuntu 16.04 ships python-wxgtk3.0