Curtis Mayfield’s poetically funky mix of soul and street-real lyrics revolutionised R&B, first with his ’60s group The Impressions on socially conscious cuts like “Choice of Colors”, and then solo with propulsive tunes like “Move On Up”. But it took a titan like Aretha Franklin to do justice to his modern-gospel anthem “People Get Ready”, and when Fishbone added a punk edge to “Freddie’s Dead”, it underlined Mayfield’s pan-generational appeal.