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
El Mariachi him free. Meanwhile, Azul, who has no directions to Moco's home, takes Dominó with him and orders her to take him to Moco's, or Moco will kill the mariachi. Dominó agrees in order to save the Mariachi's life. When they arrive at Moco's gated compound, Azul pretends to take Dominó hostage in order to gain entry. Moco soon realizes that Dominó has fallen for the Mariachi and, in a rage, shoots both her and Azul. Suddenly, the Mariachi arrives to find the woman he loves gunned down. Moco then shoots the Mariachi's left hand, rendering him useless as a guitar