Mr. Stubblefield performed on several of Brown’s classics in the 1960s and early 70s, including “Cold Sweat,” “Say It Loud — I’m Black and I’m Proud,” “I’ve Got the Feelin’,” and the album “Sex Machine.” Rolling Stone magazine said it was sampled on more than 1,000 songs and served as the backbeat for countless hip-hop tracks, including Public Enemy’s “Fight the Power,” Dr.