Mariachi giving them modified shapes and tunings. In addition to instruments, the Spanish introduced the concept of musical groups—which, in the colonial period, generally consisted of two violins, a harp, and various guitars. This grouping gave rise to a number of folk musical styles in Mexico. One of these folk musical styles was the "son". This music featured string instruments. "Son" music divided into various regional varieties—the variety popular in the Jalisco area was called "son jalisciense", whose best known song, also referred to as "the mariachi national anthem," is “La Negra.” Modern mariachi music developed from this "son" style, with
Mariachi of trumpets and the use of charro outfits by mariachi musicians. The musical style began to take on national prominence in the first half of the 20th century, with its promotion at presidential inaugurations and on the radio in the 1920s. In 2011 UNESCO recognized mariachi as an Intangible Cultural Heritage, joining six other entries on the Mexican list of that category. The origin of the word is disputed, but prominent theories attribute it to indigenous roots. One states that it comes from the name of the wood used to make the dance platform. Another states that "Mariachi" comes from