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
7. keyboard instrument components
8. [swells and swell components]
9. swell components

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment
4. Sound Devices
5. sound devices
6. sound devices by acoustical characteristics
7. aerophones
8. organs

Anotations

Scope note:

Boxlike chambers within an organ or reed organ housing a set of pipes or reeds, and having on one side a movable lid, shutter, or set of shutters or slats that can be opened or closed to increase or diminish the tonal volume of the pipes or reeds within.