Soul provider Nigel Hall is in many ways an artist who needs no introduction. An in-demand sideman, he’s built a mighty foundation of funk over the years onstage and in the studio with collaborators including the Warren Haynes Band, Jon Cleary, Soulive, Oteil Burbridge and Roosevelt Collier, Ledisi, the Soul Rebels, Lettuce and countless others. Legions of fans are already …