Booker T. & the M.G.'s were an American instrumental R&B/funk band that was influential in shaping the sound of Southern soul and Memphis soul. The original members of the group were Booker T. Jones, Steve Cropper (guitar), Lewie Steinberg (bass), and Al Jackson Jr. (drums). In the 1960s, as members of the Mar-Keys, the rotating slate of musicians that served as the house band of Stax Records, they played on hundreds of recordings by artists including Wilson Pickett, Otis Redding, Bill Withers, Sam & Dave, Carla Thomas, Rufus Thomas, Johnnie Taylor and Albert King. They also released instrumental records under their own name, including the 1962 hit single "Green Onions". As originators of the unique Stax sound, the group was one of the most prolific, respected, and imitated of its era.

Memphis soul, also known as the Memphis sound, is the most prominent strain of Southern soul. It is a shimmering, sultry style produced in the 1960s and 1970s at Stax Records and Hi Records in Memphis, Tennessee, featuring melodic unison horn lines, organ, guitar, bass, and a driving beat on the drums.