Today we’re revisiting a conversation with the royal family of roots music. On this edition of “Two Way Street,” Béla Fleck and Abigail Washburn speak 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.