传统爵士, or traditional jazz, originated in the early 20th century in the United States, particularly in New Orleans. It combines elements of African American musical traditions, blues, and ragtime. Characterized by its lively rhythms and improvisation, traditional jazz often features instruments like the trumpet, trombone, and clarinet. This genre emphasizes collective improvisation, where musicians create spontaneous melodies together. Notable figures in traditional jazz include Louis Armstrong and Duke Ellington, who helped popularize the style. Traditional jazz laid the foundation for many other jazz genres, influencing music worldwide and continuing to be celebrated in festivals and performances today.