For the 50th anniversary of the composer's death, Andris Nelsons and the Boston Symphony Orchestra conclude their award-winning, decade-long Shostakovich Project by presenting the Shostakovich symphony cycle, featuring Yo-Yo Ma's performances of the two cello concertos. Introducing the latter work to the audience, Ma said, "This piece is as relevant today as it was then. I think Shostakovich's artistic truth was to represent the voice of the voiceless."