The document discusses three musical instruments: the bagpipe, violin, and accordion. The bagpipe uses enclosed reeds fed from a constant air reservoir in the form of a bag, and has been played for centuries across Europe, Turkey, and Northern Africa. The violin is a small, high-pitched string instrument tuned in perfect fifths and is the smallest member of the violin family. Accordions are box-shaped instruments that use bellows and free reeds, and are also known as squeezeboxes; a person who plays the accordion is called an accordionist.