The sheet music for a band organ is pictured above. It consists of a very long roll of waxy paper with dots and dashes cut into it. These holes are the notes of the piece of music. One roll of paper can include six to ten songs, with blank spaces in between to separate them.
These rolls of music are created in the perforating shop. First, a worker takes a piece of regular sheet music and then transcribes it to a master roll by carefully cutting out each note. The factory also has large machines which can perforate each smaller roll, making the job quicker.
There is also a player piano at the museum which works in a similar way to the organs. In the picture below, it is easy to see where the roll of waxy paper fits into the piano.