Waldo De Los Rios has been played on NTS shows including Geologist Presents: The O'Brien System, with De Dónde Vienen Las Guitarras first played on 6 January 2017.

Waldo de los Ríos (7 September 1934 - 28 March 1977) was an Argentinian composer, conductor and arranger.

He is best-remembered for his ability to transform European classical music into pop music. His 1971 arrangement of Mozart's Symphony No. 40 recorded with the Manuel de Falla orchestra, reached the top spot in the Dutch charts and scored a top 10 hit in several other European countries. In 1970, prior to this success, Waldo de los Rios had already…