The air itself is the vibrator in the primary sense. The standing waves are significantly confined within the instrument itself. Within each of the set of pipes, the column of air is made to vibrate by the intermittent access of an air stream produced by means of lamellae. Each conical bore pipe has a reed of paired lamellae (usually a flattened stem), which periodically open and close, controlling the flow of air. In each single-reed pipe in the set of two or more, the column of air is made to vibrate by the intermittent access of an air stream produced by means of a [single] 'reed' consisting of a lamella which periodically opens and closes an aperture, controlling the flow of air. The instrument is tuned by altering the lengths of the air columns. Scottish bagpipes with a regulator.
Sets of oboes with conical bore combined with a set of reedpipes with single reeds
Hornbostel - Sachs
Sets of oboes with conical bore