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:

Use generally for any of several types of levers, operated by the foot and used on sound devices for a variety of purposes such as to change tuning, operate a bellows, strike a drum head, produce expressive effects, or function as keys in a pedalboard.