This past November, I logged into Facebook and noticed a post at the top of my timeline. It was about a project called “Choral meets Machine Learning,” put together by six 18-year-old gymnasium (German high school) students who were members of the Regensburg Domspatzen (Regensburg Cathedral Choir, literally: Regensburg Cathedral Sparrows), the oldest and one of the most renowned youth choirs in the world. For the project, the students had successfully developed an AI system capable of...