John Carter (1932–2019) was an American composer, musician, and producer, best known for his contributions to the fields of jazz and progressive rock. He initially gained prominence as a member of the influential jazz group The New York Contemporary Five in the early 1960s. His eclectic style blended elements of jazz, rock, and avant-garde music. Carter is perhaps most recognized for his work with the band *Carter, Cummings & Co.*, which showcased his innovative approach to composition and improvisation. His notable works include the album "The Great American Songbook" and collaborative projects with artists like Carla Bley and the influential avant-garde ensemble *The New York Art Quartet*. In addition to his performance career, Carter was an accomplished producer, working with a variety of artists across genres, thereby broadening the reach of jazz and progressive music. His impact on music is reflected in his ability to bridge genres and inspire a generation of musicians to explore new sounds and structures. Carter's legacy continues to influence contemporary jazz and progressive rock musicians today.