[citation needed] Many of his songs address what he sees as the social problems in Latin American and various human rights issues.

In 1972 the singer turned into the first Argentine entrant in the first edition of the OTI Festival which was held in Madrid.

[citation needed] His song "Sabes que estamos aquí América" (You know we are here America) ended last in a tie with other four entrants, his talent didn't go unnoticed.

[citation needed] He has recorded with various artists, such as Joan Manuel Serrat, Mercedes Sosa, León Gieco, Milton Nascimento, Cuarteto Zupay, Silvio Rodríguez, and Pablo Milanés, amongst others.

[citation needed] His works include Todavía Cantamos ("Still We Sing"), Sobreviviendo ("Surviving"), El viejo Matías ("The old man Matías"), Dulce Daniela ("Sweet Daniela"), and Razón de vivir ("Reason to live").