It seemed to me have discovered a wonderful thing: holes that produce sound!
Then I thought to trace that music and make visible its presence –– as the paper showed only emptiness and words (the lyrics).
The music is a combination of sounds and silences (the pauses between notes), and at the same time it is an emotion in crescendo that remains etched even when the melody fades.
A piano roll is a continuous roll of paper with perforations (holes) punched into it, used to operate a player piano. The perforations represent the notes.