Fourth World, Vol. 1: Possible Musics is an album by Jon Hassell and Brian Eno. It was recorded at Celestial Sounds in New York City and released in 1980 by Editions EG, an imprint label of E.G. Records. "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." The album received praise from many critics.