Although they began as an artsy prog rock band, Styx would eventually transform into the virtual arena rock prototype by the late '70s and early '80s, due to a fondness for bombastic rockers and soaring power ballads. The seeds for the band were planted in another Chicago band during the late '60s, the Tradewinds, which featured brothers Chuck and John Panozzo (who played bass and drums, respectively), as well as acquaintance Dennis DeYoung (vocals, keyboards). - From Last.fm Artist Summary