Ann, Regina and Freda McCrary have lent gospel gravity to many a rock, pop, R&B and roots recording session over the years. Bob Dylan, Mike Farris and all of their other employers got a lift from their graceful yet from-the-gut harmonizing, a gift the daughters of the Rev. Samuel McCrary — of Nashville’s treasured gospel-singing quartet The Fairfield Four — honed from girlhood. It seems like something new is released every month with one or more of their vocal imprints on it; Dr. John’s upcoming Dan Auerbach-produced album is but one example. These days the Sisters are also claiming the spotlight for themselves, and that’s a good thing. With a lineup rounded out by their sister Deborah — who’d long ago traded singing for nursing — they put out a wide-ranging gospel album under their own name last year, titling it Our Journey, and they’re regularly playing their own shows around town. They’ll have a crack four-piece band and several special guests for this one, which also celebrates Freda’s birthday.