Colombian Cumbia Group From Medellín Active 1960/1965 . With Miguel Velásquez Saxophone Clarinet Accordion Mario Escobar Singer Guitar Contrabass Jorge Juan Mejía Guitar Singer Fabio Hernández Piano Luis Fernando Escobar Drums Álvaro Arango Percussions Gonzalo Escobar Percussions Álvaro Velásquez Drums Percussions