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 El Bronx (2009 album) another band where they play mariachi music." In March 2009 The Bronx played the South By Southwest festival in Austin, Texas, followed by a tour of the United States ending in June. In an April 2009 interview, Caughthran spoke more about "Mariachi El Bronx": The record's been done for a while now, hopefully it's gonna come out in like early or mid summer. It's a really really important record; it's the best thing I've ever done. It's all original music, traditional mariachi stuff, and it's the punkest thing in the world for a band like The Bronx to put out