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
The Marshall Tucker Band into its sound, most frequently blues, country and jazz. The band has also drawn from boogie, psychedelic, R&B,gospel, folk and rock and roll. According to Allmusic's Jeff Tamarkin, Toy Caldwell's guitar playing style was categorized by "flashy, jazzy llicks; the band has also been noted for extensive jamming. The band's eclectic musical style has predominately been categorized as Southern rock. The band's music has also been categorized as blues rock, country rock, jazz rock and as a "proto-jam band". "Billboard" charts have categorized the band as country, blues and adult contemporary. The band's self-titled debut album was categorized as country