The rock has developed after the 1950s, has its origins in rock and roll, which emerged in the United States in the late 1940s.
     At the end of the 1960s were developed different subgenres of rock mixed with folk music, blues and jazz, born folk rock, blues rock and jazz rock. with time were coming more sub-genres like heavy metal, hard rock, among others.
the rock sound is usually created by electric guitars.
    Famous bands like Guns n 'Roses and Rolling Stones made their fame with this style of music.

by: Ronan Kroeger