A concert given earlier this month at the Barbican concert hall, in which the cellist Yo-Yo Ma and pianist Kathryn Stott appeared togetherforthe second time as part of the Barbican's Great Performers season. They were joined by the brothers Sergio and Odair Assad (the modern guitar duo featured on Ma's Soul of the Tango album), and by clarinettist Paquito D'Rivera and percussionist Mark Suter.