The distinction between "son" and modern mariachi comes from the modification of the music. By the end of the nineteenth century, the European art music tradition was firmly transplanted to Mexico, with opera, salon music, waltzes, and more written and performed both by Europeans and Mexicans in the country. One variety was the salon orchestras called "orquestas típicas" that performed in more rural settings, notably in charro outfits. This use of the charro outfit was repeated with urban mariachi in the 1920s.