When the cello sings, we hear something akin to the human voice: sensuous, rich, profound. When Nicolas Altstaedt holds the bow, the cello is all that and more, becoming a master storyteller. It’s been more than a decade since the young cellist burst onto the world stage as a BBC New Generation Artist, with his unruly curls, unorthodox concert attire and pure talent. Since then, he’s piled up musical accolades from the stages of New York, London and beyond. Now is your chance to see his ACO debut as both director and soloist.