Isotope 217° is a Chicago-based band composed mainly of members from Tortoise and the Chicago Underground Orchestra that was formed in 1997. The New York Times described the band as "..adept to varying degrees at rock and funk and jazz and electronics, turn those introspective moments into jams that are messier and warmer than Tortoise's."

Discography Album information The Unstable Molecule Released: 1997 Label: Thrill Jockey Commander Mindfuck / Designer EP Released: 1999 Label: Aesthetics Utonian Automatic Released: 1999 Label: Thrill Jockey Who Stole the I Walkman Released: 2000 Label: Thrill Jockey