It consists of a leather bag, which receives the air by a tube that is stopped by a valve; and three sounding pipes, into which the air is pressed by the performer. Two of these pipes produce fixed tones, namely, the bass, or key tone, and its fifth, and form together what is called the drone; the third, or chanter, gives the melody. Family of Instruments: The Bagpipe belongs to the family of Woodwind instruments.

 Medieval Musical Instruments - Bagpipe
Medieval Musical instruments, including the Bagpipe, would be used by the musicians of the period including the Waits, Minstrels or Troubadours. There were three categories of musical instruments in the Middle Ages - wind, string and percussion. Terms of description were Bas instruments and Haut instruments. Bas referred to soft instruments (literally, "low," but referring to volume, not pitch) which were suitable for the chamber which included the vielle, rebec and other bowed strings, the lute and other plucked strings. Haut referred to loud instruments (literally "high" but referring to volume, not to pitch) which were suitable for outdoors which included the shawm, sackbut, pipe and tabor.