Husband-and-wife banjo virtuosi Béla Fleck and Abigail Washburn have mastered the deceptively intricate art of the duet. Their performances embrace a diversity almost unbelievable coming from just two banjos and one voice. Washburn’s beguiling playing and singing blend with 15-time Grammy winner Fleck’s riveting, boundary-breaking musicianship to create an explosion of driving, melodic white heat.