Every first-time pilgrim to Jazz Fest has a “conversion band”: a musical discovery so ear-opening that it transcends the event’s numerous minor epiphanies. For me, and for many other Fest-goers in the late ’80s and early ’90s, that band was the subdudes. Now the ’dudes are back with a capital “D,” reformed as the Dudes by three of the four original members. And for the first time since they disbanded in 1996, they’ll be out at the fairgrounds to ...