Music is a collaborative art and a solitary one -- solitary at times in creation and at practice and study, collaborative with listeners, other players and singers, and at times, with musicians who are also partners in life. From the landscapes and traditions of Cape Breton, Ontario, Texas, Ireland, and Boston, among other places, Natalie MacMaster and Donnell Leahy, Bruce Robison and Kelly Willis, and Matt and Shannon Heaton draw their stories told in word and melody...