Why can jazz be recognized by the way musicians play even when they perform different kinds of music?

Jazz is often recognized not by the specific notes or compositions being played, but by the distinct manner in which musicians perform them. This unique identity is rooted in the specific ways jazz musicians attack, inflect, release, embellish, and color notes on their instruments.12

Even when performing music outside of the jazz idiom, such as classical pieces, musicians trained in the jazz tradition apply their own idiomatic phrasings and techniques—including the use of brass mutes, glissandos, scoops, and bends—which often leads listeners to perceive the performance as jazz.2

While elements like improvisation, syncopation, and swing are frequently associated with the genre, they are not present in every instance of jazz. Ultimately, the defining characteristic that separates jazz from other musical forms is the creative approach of the performer, who acts as an improvising composer rather than merely interpreting a fixed text. As the legendary trumpeter Louis Armstrong famously suggested, the essence of jazz is something that is felt rather than strictly defined.23