There is no exact date for the birth of jazz. At the beginning of the 20th century, a new kind of improvisational music was first performed and recorded - exciting and loud - which was destined to conquer the whole world and survive a whole chain of ups and downs. In this music, which did not know notes, improvisation was important, born here and now . Researchers have given dozens of definitions, but jazz, like fire, does not want to take a frozen form and, like water, flows in accordance with its internal laws.