Alison Fensterstock

In three-quarter profile, half-smiling at the camera over his elaborately tattooed shoulder, New Orleans trumpeter Irvin Mayfield, Jr. appeared on the cover of the April 2015 issue of the venerable Louisiana music monthly Offbeat.

At 46, Ben Jaffe is almost exactly the same age as Jazz Fest. Like a lot of New Orleans natives, he has memories of the annual event stretching back to childhood, though his experience is a little more rarefied than most. "That's where I got to sit on Fats Domino's lap and then hear him play," he says. "It's where I heard Allen Toussaint play for the first time as a child.

The New Orleans Jazz and Heritage Festival kicks off its 47th iteration today, April 22. To celebrate its patron saint, we take a listen back to a particularly fierce live version of Professor Longhair's take on "Mess Around."