By the 19th century, Son jalisciense developed to be played with one vihuela, two violins and a guitarrón (which replaced the harp).
The best known song of this type of son is called “La Negra”.
Modern mariachi developed when brass instruments such as trumpets were added.
[1] Son jalisciense has both instrumental and vocal songs in this form, mostly in major keys.
It has an alternating rhythmic pattern in the harmony (guitars, vihuela) and guitarrón.