Episode 323: This episode of The String is a field report from the city that raised me in the 1970s and 80s and gave me my foundation in music, from college rock radio, to youth orchestra at Duke University, to jazz tutelage at a Black Muslim community center. It’s an arts-forward city that in the past decade has become something of a magnet for roots music, building on a history of gospel, blues and string band music, while Biscuits & Banjos, the new festival conceived by Rhiannon Giddens, has put itself in a position to be a bridge from the past to the future and give Durham the identity it’s lacked as a national music hotspot.