This music was already being modified in part due to the advent of sound recording.For example, most son jaliscense songs were longer than the standard three-and-a-half minutes of the then-standard 78 rpm record, forcing the shortening of tunes.
During this time, the Mexican government 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.
) is a musical expression that dates back to at least 18th century in Western Mexico.
It is a tradition that can be defined by eight socio-musical elements: mariachi instrumentation and texture, musical genres and subgenres, performance methods and styles, singing styles and forms, dance styles, performative space, performance clothing, and the word "mariachi".
These mariachi musicians developed new practices, such as performances in plazas and restaurants.
However, it also continued its more traditional venues such as serenades, and performances at major family events.
Prior to the arrival of the Spanish, indigenous music was played with rattles, drums, flutes, and conch-shell horns as part of religious celebrations.
The Spanish introduced violins, guitars, harps, brass instruments, and woodwinds, which mostly replaced the native instruments.
The music also gained attention in Mexico City when a wealthy hacienda family brought an early Mariachi from Cocula to play for President Porfirio Díaz in 1905.
The common perception of the music and look of mariachi developed in the 20th century, as the music was transformed from a regional rural folk music to an urban phenomenon that came to represent Mexico.
This was a common explanation on record jackets and travel brochures.