How did New Orleans-style jazz differ from Chicago-style jazz?

New Orleans-style jazz and Chicago-style jazz are closely related, as the latter developed largely from the influence of New Orleans musicians who migrated to Chicago in the 1920s. While they share roots in collective improvisation, they are distinguished by several key musical differences:12

• Solo vs. Ensemble Focus: New Orleans style is defined by its emphasis on collective improvisation, where all ensemble members simultaneously embellish the melody. In contrast, Chicago style shifted the focus toward the individual soloist, with the soloist coming to the fore.321
• Rhythmic Emphasis: New Orleans music maintained a "square" rhythm heavily influenced by marching bands. Chicago style incorporated more blues trademarks, specifically emphasizing the second and fourth beats (the offbeats) in each measure.2
• Musical Influences: New Orleans style was deeply rooted in 19th-century Black ethnic music and marching band traditions. Chicago style, while imitating New Orleans bands, showed a somewhat smaller reliance on those specific 19th-century ethnic elements and was further shaped by the soloistic innovations of musicians like Louis Armstrong and the white "Chicago school" players.12

Would you like to learn more about the specific musicians who pioneered these styles?