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
Corps style band by American high schools to utilize the corps style of marching rather than the military style. This is most likely due to the fact that the corps style allowed for a much broader selection of musical styles, tempos, and moods, versus the limitations of the traditional military march. Another important factor is that the Corps Style bands face the audience, versus the military bands primarily facing the end zones, therefore, the corps style band has a much fuller sound, and is generally louder. The 80's also saw the movement away from strict 8 to 5 step size to the usage