Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Sound Devices (hierarchy name)
5. sound devices (equipment)
6. [sound devices by acoustical characteristics]
7. aerophones
8. reeds (aerophones)
9. reedpipes (confined aerophones)
10. [reedpipes with double reed]
11. [reedpipes with double reed: with conical bore]
12. [reedpipes with double reed: folded conical bore]

Anotations

Scope note:

European reedpipes, well-known from the late 16th to the early 18th century and considered to be the precursor of the bassoon, having a body made of a single piece of wood with two parallel conical channels bored down and up within it, a bell at the top of and integral with the body, and a short crook carrying a double reed.