Isotope 217° is a Chicago

Chicago

Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

 based band composed mainly of members from Tortoise

Tortoise (band)

Tortoise is an American post-rock band formed in Chicago, Illinois, in 1990.-Music:Tortoise's almost entirely instrumental music defies easy categorization, and the group gained significant attention from their early career. The members have roots in Chicago's fertile music scene, playing in...

 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 Thrill Jockey Thrill Jockey Records is an American independent record label established in 1992 in New York City by former Atlantic Records A&R representative Bettina Richards.-History:...
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