Known for their Stax/Volt session work and backing the likes of Isaac Hayes and Otis Redding, catch a glimpse of this electric set of Memphis-based The Bar-Kays at 1972’s iconic Wattstax festival. Self-dubbed “Black Rock” like the name of their 1971 album the year prior, the band’s guitar-driven slab of heavy funk in the Sly/Funkadelic vein is powerfully captured both in the concert’s double album soundtrack and in the Mel Stuart-directed Wattstax film. “A convergent point between, soul, funk and rock ‘n’ roll”, as Stax retrospectively identifies such eclecticism.