I did listen to 1920s jazz or Al Johnson and a lot of early singers coming out of England. I would branch out a little bit to get a sense of the world that he might be coming into, in the '30s when jazz was changing.
One is rarely an impulsive innovator after the age of sixty, but one can still be a very fine orderly and inventive thinker. One rarely procreates children at that age, but one is all the more skilled at educating those who have already been procreated, and education is procreation of another kind.