We design distribuited audio systems over ethernet. By the use of Barix modules, it becomes possible to transmit different audio sources to different environments. There are many possible applications of this solution: home automations, hotels and public announce systems for companies and public administrations. Moreover, by the use of Powerline devices it is possible to install a LAN without the need of adding cables, simply the existing power line becomes the ethernet lines, so a multizone audio system becomes easy and cheap to install.