T o find a song that matches our mood, in the 21st century, we need only type in how we are feeling or walk into a new room, and a streaming service’s algorithm will grab that data and intuit our ...

This is our second story in our series on the characteristics of musical keys. We started with the “people’s key,” C major. From there it’s an easy skip to D, the root of today’s subject, the “saddest ...