Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. sound device components

Anotations

Scope note:

Rolls of paper meant to be used as scores for mechanical instruments such as player pianos and fairground organs. Perforations are made on the paper which allows the mechanical keys of the instruments to create sound via air flow though the perforations.