The Special Consensus, or "Special C", is a four-person acoustic band based in Chicago, Illinois USA. They play primarily bluegrass, including traditional and contemporary standards, as well as compositions by band members. The Special Consensus tour year-round, focusing on the Traditional American Music (TAM) program they created to introduce students to bluegrass music. Special Consensus has had numerous members come and go since its start in 1975, but the one constant has been founding member and banjo/vocalist Greg Cahill.