Mariachi was heavily involved in cultural promotion as a way to create a unified Mexican identity after the end of the Mexican Revolution. One of these efforts was the promotion of mariachi as an international symbol of Mexican identity, first with radio and sound recordings and later with films. Mexico built a nationwide radio broadcasting network in the 1920s such as XEB and XEW, which began broadcasting mariachi music as a media production, rather than as a music for social events. This music was already being modified in part due to the advent of sound recording. For example, most son jaliscense
Mariachi of orchestra, keeping the traditional son/mariachi base while integrating new musical ideas and styles. One other innovation, in contrast to the machismo of the style were the first female mariachi performers, Lola Beltrán and Lucha Villa. One night Mariachi Vargas put Beltrán on stage when she was a teenager. Her versions of “Cucurrucucu Paloma” and “Tres Dias” are now considered classics. Many of the traditional sounds of Cocula were lost as mariachi groups incorporated other musical styles that were popular on the radio. New influences have come into the tradition from the Mexican American community in the United States. In