Get ready for a dynamic blend of cello and guitar when Jenn and Jonathan Adams perform at the North Columbia Schoolhouse Cultural Center on Saturday. Their name, Montana Skies, is a metaphor for musical freedom, and they are following their creative instincts far beyond traditional boundaries. “While the music defies simple categorization, it is a fusion in the truest sense of the word,” Jenn Adams said. “It’s been called everything from chamber rock to psychedelic strings. Whatever you want to call it, rest assured, this ain’t your granny’s chamber music.” In concert, these award-winning musicians delve into music from Pink …