1. Traditional Jazz: This refers to the earlier forms of jazz music that developed in the late 19th and early 20th centuries. Traditional jazz is characterized by a collective improvisation approach, where musicians come together and spontaneously create music based on a common chord progression or melody. It often features instruments like the trumpet, clarinet, saxophone, piano, and double bass. Some popular styles within traditional jazz include Dixieland, New Orleans jazz, and ragtime.
2. Modern Jazz: Modern jazz emerged in the mid-20th century as a departure from traditional jazz. It is characterized by more complex harmonies, rhythms, and improvisational structures. Modern jazz often involves experimentation with different musical styles, including classical music, folk music, and electronic music. Some notable styles within modern jazz include bebop, cool jazz, hard bop, free jazz, and fusion.
These two categories serve as broad classifications for the vast range of jazz music that exists. However, it's worth noting that the boundaries between different jazz styles are often blurred, and many jazz musicians and bands draw influences from multiple styles, creating unique and eclectic sounds.