This week we take on the extremes of soul music, the ever swinging pendulum between despair and semi-holy optimism. We have 4 versions (2 live, 2 studio) of Marvin Gaye’s Inner City Blues classic plus versions by Nona Gaye (Marvin’s daughter), Gil Scott-Heron and Meshell Ndegeocello); and then there’s the funky despair of afro-German Joy Denalane’s cover of Prince’s Sign Of The Times contrasted by the exultant, hard-won contemporary optimism of London-born Alison David. We await your responses.