CHILLAN, CHILE - January 20: Presentation of the rock group Los Jaivas, on the stage of the Universidad de Concepción. Los Jaivas is a Chilean rock band, noted for the combination of psychedelic rock and progressive rock with Latin American folk instruments and rhythms, especially Andean. The group was formed in Viña del Mar, Valparaíso Region, Chile in 1962 and is currently active. They have often been considered the most important and influential band in Chile and one of the most prestigious in South America.