His third RCA LP, from 1976, is the most soulful and laid-back, with groovy Marvin and Stevie covers, and the two-step killer I Love You. Don Blackman on lead vocals, Mchael Brecker leading the horns.

From 1972, taking time out from the Nina Simone band to cut this funky Black-Jazz-style set for his own label, with Horace Silver’s ‘personal seal of approval’. Includes Mr. Clean and Sister Sanctified.

His ambitious 1974 breakthrough as leader, superbly mixing funk and jazz improvisation on a major-label recording budget, with strong political and spiritual themes, even a nod to the Duke.