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) plans to record both a mariachi album and a punk rock album in short succession, hoping to release the former before the end of that summer. However, they did not enter the recording studio until March 2008, by which time they planned to release the mariachi album before the end of the summer. "Mariachi El Bronx" was recorded in March 2008 at Brandos Paradise in San Gabriel, California with producer and engineer John Avila, who also played charango, sang backing vocals, and mixed the album with the band. In June 2008 the band posted a video to YouTube of themselves