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 El Bronx (2009 album) another band where they play mariachi music." In March 2009 The Bronx played the South By Southwest festival in Austin, Texas, followed by a tour of the United States ending in June. In an April 2009 interview, Caughthran spoke more about "Mariachi El Bronx": The record's been done for a while now, hopefully it's gonna come out in like early or mid summer. It's a really really important record; it's the best thing I've ever done. It's all original music, traditional mariachi stuff, and it's the punkest thing in the world for a band like The Bronx to put out