During the 20s, the time of the great depression, the most famous music was jazz.
It is defined as a way of musical art which its origins came from USA between the confrontations of the black people with the European music. The instrumentation, melody and harmony of the jazz are derived from the Occidental music.
The record in 1917 of "La Original Dixieland Jass Band" (Jass with two “s”) opened the first records of the jazz record companies. In spite of the technical deficiencies of sound of the first jazz records, it allows us to observe how in few minutes that artists could create great masterpieces of music.