On this edition of “Two Way Street,” we’re talking to the “royal family of roots music,” Béla Fleck and Abigail Washburn , about their new album, “ Echo in the Valley .” This is their second collaboration, following the success of their self-titled debut, “ Béla Fleck & Abigail Washburn ,” which took home the Grammy for “Best Folk Album” in 2016. We hear about the early influences that drove Béla to the banjo, despite growing up in the urban center of New York City. Plus, we learn about the