The fusion between jazz and classical music is known as "third stream" music. Third stream music emerged in the late 1950s and early 1960s as a reaction to the strict boundaries between jazz and classical music. It sought to create a fusion of these two genres, with elements of jazz improvisation and swing combined with the formal structure and harmonic language of classical music.Third stream music introduced a new aesthetic that combined the spontaneity and improvisational nature of jazz with the intricate compositions and techniques of classical music. It often featured orchestras or chamber ensembles alongside jazz musicians, incorporating elements such as jazz solos, syncopated rhythms, and swing feel into classical compositions.Notable composers and musicians associated with third stream music include Gunther Schuller, John Lewis, and George Gershwin. Gunther Schuller is particularly known for coining the term "third stream" and for his own compositions that blend elements of classical and jazz music.Third stream music continues to influence contemporary compositions and performances, with various artists and ensembles exploring the fusion of these two genres.