Béla Fleck and Abigail Washburn met at a square dance and began playing music together over a decade ago, marrying shortly thereafter. Fleck had long been interested in the banjo, but Washburn’s path to a music career was more roundabout: a proffered record deal in the halls of a bluegrass convention in Kentucky changed her trajectory from becoming a lawyer in China to a traveling folk musician.Echo in the Valley is the follow-up to acclaimed, self-titled debut that earned the duo a 2016 Grammy for Best Folk Album.