Muscle Shoals Sound Studio is an American recording studio in Sheffield, Alabama, formed in 1969 by four session musicians known as The Muscle Shoals Rhythm Section. They had left nearby FAME Studios in Muscle Shoals to create their own recording facility.

Traffic were an English rock band formed in Birmingham in April 1967 by Steve Winwood, Jim Capaldi, Chris Wood and Dave Mason. They began as a psychedelic rock group and diversified their sound through the use of instruments such as keyboards, sitar, and various reed instruments, and by incorporating jazz and improvisational techniques in their music.