Dr. Lewis Porter has been busy since penning the biography John Coltrane: His Life and Music. Porter, an author, musician, and educator is bringing his extensive knowledge and insight to a new project. “What I have are a number of short lessons about individual jazz performers, certain jazz techniques, the origins of be-bop is one of them.” The first “Deep Dive with Lewis Porter” takes a look at pianist Art Tatum. “The crazy thing is that even people who feel they ‘get’ Tatum, in my judgement