"Otis’ songs have shaped the cultural landscape across genres and generations," remarked SMP chief Jon Platt.
The four-part HBO series, directed by Jamila Wignot, premieres May 20-21.
"The test of time shows that he had a freaking secret formula that nobody has been able to emulate. Even today the music just blows you away."
S-Curve Records CEO Steve Greenberg, who worked with Stewart on "The Complete Stax/Volt Singles 1959-1968," remembers the pioneer and his groundbreaking label.
The late label chief is "an important piece of American music history," and an instigator in the Southern soul movement.
