The well-worn and often overblown expression “music is a common language” has never been more apropos in the case of Joe Driscoll & Sekou Kouyate. US-born, England-based Driscoll speaks no French and Kouyate, who hails from the West African country of Guinea, little English. When they were brought together at the Nuit Metis (Mixed Night) festival in Marseille, France in 2010 and given a week to produce a concert, music was the only way they could communicate.