sentence: Some bassoons have a white, ivory ring round the top of the bell joint.
sentences_after: Bassoons have keys to help the player to cover all the holes, but these keys do not use the Boehm system like the other woodwind instruments. German bassoons use a system called the Heckel system, and French bassoons use the Buffet system.
concept_name: bassoon
headings: Bassoon
categories: Woodwind instruments