This musical instrument consists of a chanter, several drones & an air sack
The Oxford History of Music says that a sculpture of bagpipes 
has been found .... Bagpipe making was once a craft that produced instruments in 
many... [DOC] [TLE] Traditional Music in the Time of Vermeer: The Bagpipes [PAR] As a wind instrument, the bagpipe belongs to the class of aerophones ... form 
consists of a "chanter," one or more drones all supplied with air from the bag, ...