👉 A pianograph is a type of mechanical reproduction of musical notation, used in early music recording and publishing. It was invented by Johann Sebastian Bach in 1720 to record his compositions for piano, thereby making them more accessible to composers and audiences. The process involved using a wooden key to cut out the notes from each piece of music and then placing these cuts on a wooden plate or sheet that could be held in place with a hand holding it up to a piano's keys. The pian