The Toronto-based Downchild Blues Band, co-founded in 1969 by two brothers, Donnie and Richard "Hock" Walsh, served as an inspiration for the two Blues Brothers characters. Aykroyd modeled Elwood Blues in part on Donnie Walsh, a harmonica player and guitarist, while Belushi's Jake Blues character was modeled after Hock Walsh, Downchild's lead singer. In their first album, "Briefcase Full of Blues" (1978), Aykroyd and Belushi featured three well-known Downchild songs closely associated with Hock Walsh's vocal style: "I've Got Everything I Need (Almost)", written by Donnie Walsh, "Shotgun Blues", co-written by Donnie and Hock Walsh, and "Flip, Flop and Fly", co-written and originally popularized by Big Joe Turner. All three songs were on Downchild's second album, "Straight Up" (1973), with "Flip, Flop and Fly" becoming the band's most successful single, in 1974.