he is singing just so wonderfully here. He's one of the greatest of all blues singers and the equal of Muddy Waters, with whom he played as a 'sideman' pianist for so long. Littlle Water could not sing so good. But Otis Spann, could.
You know I gotta agree with you, I often considered that bit of distortion added a bit to it. I found some Otis at the local libary, The man had it goin' on.