One of music’s great joys is the sound of a well-tuned acoustic instrument. Everything from guitars to drums to pianos all come to life when they’re properly tuned, but they can also stand out like a ...

At Hack a Day, we don’t throw the term genius around lightly. We’re obligated to bestow that title on [Don Gilmore] for his amazingly simple self-tuning piano. To appreciate [Don]’s build, you need to ...