Tower of Power: Sunday, May 5, WWOZ Jazz Tent, 5:30p

Fifty-six years makes for a whole lot of funk. And in Tower of Power’s case, a whole lot of people as well. More than 60 bandmembers have passed through the ranks in that time, but the soulful essence of the band has been consistent.

“We learned early on what our voice is, what our sound is. That’s the key for every major artist—you find your signature and you keep chipping away at the sculpture,” says founding member...