Argentinean vocal group Opus Cuatro began its impressive career in the late '60s, playing traditional Latin tunes and local folklore. The foursome's discography started with the release of America in 1970, followed by 1971's Con America en la Sangre and 1973's Si Somos Americanos. Opus Cuatro has been successfully touring the world, being acclaimed in Europe and North America while getting recognition as one of the most prominent Latin Folklore ambassadors. ~ Drago Bonacich