consisting of two or more single- or double-reed pipes, the reeds being set in motion by wind fed by arm pressure on an animal-skin (or rubberized-cloth) bag. The pipes are held in wooden sockets (stocks) tied into the bag, which is inflated either by the mouth (through a blowpipe with a leather nonreturn valve) or by bellows strapped to the body. Melodies are played on the finger holes of the melody pipe, or chanter, while the remaining pipes, or drones, sound single notes tuned against the chanter by means of extendable joints.