This paper seeks to examine the constitution, programming, audiences and social dialogue of two state radios stations in the province of San Luis: Radio Universidad in Villa Mercedes (San Luis, Argentina) - FM 97.9 and Radio Municipalidad de la Punta 87.7 in La Punta (San Luis, Argentina). The two public radio seek to differentiate themselves from commercial radios with a grid that has content appropriate to their perception of the audience. Both media strive to have an alternative programming, not traditional in its forms and its aesthetics since the so-called public media must have a wide variety of voices and nuances and have a diversity of opinions programming with contents aimed at a heterogeneous audience.