Kayhan Kalhor (original member of the Yo Yo Ma’s Silk Road Ensemble), a Kurdish/Iranian virtuoso on the four-stringed Persian spiked fiddle, the kamancheh, is joined by Turkey’s Erdal Erzincan, master of the baglam (longneck lute) for an evening of improvised sufi poetry based on their release 'The Wind' (ECM/New Note)