Φρι τζαζ, or "free jazz," is a genre of music that emerged in the late 1950s. It is characterized by its improvisational style, where musicians often play without predetermined structures or traditional chord progressions. This allows for greater expression and creativity, making each performance unique. Notable artists in this genre include Ornette Coleman and John Coltrane. The genre often incorporates elements from various musical traditions, breaking away from conventional jazz forms. Free jazz can feature a wide range of instruments, including saxophones, trumpets, and percussion, creating a rich tapestry of sound. Its experimental nature has influenced many other genres and continues to inspire musicians today.