“The Capitols, an R&B doo-wop trio originally known as the Three Caps, was formed in Detroit in 1962,” (BlackPast.org). “… The group primarily recorded dance-themed songs in the Detroit area.” After struggling for several years, “in 1966 they released the top ten hit, ‘Cool Jerk.’ The song composed by Don Storball and recorded at Golden World Studios in Detroit with the legendary Motown house band, The Funk Brothers, became their biggest hit. It was the lead single from their first album, Dance the Cool Jerk, and peaked at #2 on the Billboard R&B and #7 on the Billboard Hot 100 Chart.
During their limited career, the Capitols released 6 albums and 19 singles … The group finished the decade in 1969 with the single ‘Soul Brother, Soul Sister’ that peaked at no. 42 on the Billboard R&B chart.” Very little additional information about this track is available online, but the trio’s signature sound is as clear here as it was on the smash hit single ‘Cool Jerk.”
After a short break in the groove, the tune shifts up a whole step at 1:26.