Fourth World, Vol. 1: Possible Musics is an album by Jon Hassell and Brian Eno.[1] It was recorded at Celestial Sounds in New York City and released in 1980 by Editions EG, an imprint label of E.G. Records.[2] "Fourth world music" is a musical aesthetic described by Hassell as "a unified primitive/futuristic sound combining features of world ethnic styles with advanced electronic techniques."[3] Upon its release, the album received praise from a variety of critics.[4]