Los Testigos is a display of tools and materials, used during concerts and sound actions.

Starting in 1995, working mainly with analog media, influenced by bruitism and sonic subcultures, unstable arrangements amplified with raw electronic signals have been mixed with scattered acoustic activity resulting from chemical reactions, voltage fluctuations, and abrupt signal-routing variations. All the while, objects are piled on top of one another and are prone to collapse.

This part of the research has been shown at Sonic Acts (Netherlands), Supercollider Symposium (Germany), Simultan (Romania), transmediale (Germany), LUFF (Switzerland), Tsonami (Chile), and Aural (Mexico), among others.