Now I just found this:
"...Having secured a partnership with the soul flagship, Stax, Rock has acquired several multitracks from some of the label's rarer sessions. By having the ability to solo, mute and sample tracks within Pro Tools' interface, Rock's taken a closer listen to techniques in the age of analog production. In many ways, that has expanded his compositional vocabulary. ???Producers from the Stax era paid a lot of attention to stuff like hooks, choruses, building bridges and drum breaks. When you listen to it track by track, you start to learn how to break away from the loops and add to the dynamics. I'm trying to bring that to hip-hop producers.???