What made them unique was Jones' trance-like sound on organ and a behind-the-beat groove that made everything they played infectious.
The "delayed back beat", as it was then called, was the creation of guitarist Steve Cropper and drummer Al Jackson, Jr., who were trying to musically emulate a dance move. The groove allowed the musicians to sit in a pocket at the very bottom of the beat.
The Stax sound was complete when bassist Donald "Duck" Dunn replaced Lewis Steinberg. What occurred next was a musical role reversal with Cropper and Jones taking on a greater rhythmic role, allowing Dunn to play more melodically.
The Group was dealt a final blow with the murder of drummer Al Jackson, Jr. Al was building a career as a producer when he was cut down. Ringo Starr would pay him the ultimate tribute calling him the "Groove Maestro".
The surviving musicians would continue to play with many major artists, including a resurrection for Cropper and Dunn with the Blues Brothers. But the sound they created for "Soulsville" will forever be a part of the American soundtrack.
The Groove Continues...