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
Corps style band music. In modern times the show band style still is still fairly popular around the country. Although, one may observe a patterns in motion movement during the course of a show, it is generally not utilized for an entire performance. Even within the show band style, there are significant variations. There tends to be a style more geared towards African American traditions, and can be observed in bands from schools such as Grambling State University, Texas Southern University, or the fictitious college from the film "Drumline". This variation features more standing time, while band members dance and entertain the spectators.