Waldo de los Ríos (7 September 1934 - 28 March 1977) was an Argentine composer, conductor and arranger.
De los Rios was born as Osvaldo Nicholas Ferrara in Buenos Aires into a musical family; his father was a musician and his mother a well known folk singer; he studied composition and arranging at the National Conservatory of Music under Alberto Ginastera and Teodoro Fuchs. He was inspired by an eclectic range of music and formed a musical group called "The Waldos" which crossed folk music with electronic sounds.
Work of the pianist, composer, arranger and conductor Osvaldo Nicolás Ferrara Argentina (Buenos Aires, 1934-1977), aka 'Waldo de los Ríos'. With classical music training is remembered for his application to solve and interpret well-known works of classical music in a new pop style, which afforded him great success in sales and popularity. Waldo also made numerous arrangements for groups and well known singers of those years, especially in Spain. This disc includes his arrangements of some movements of classical symphonies. Here are the first attempts to popularize classical music as pop and the rock. Waldo conducts the Spanish Manuel de Falla Orchestra.
Los Prisioneros was maybe one of the most important and seminal Chilean Rock Punk Pop bands in Latin America.