"The hurdy-gurdy is a stringed instrument that produces sound by a hand crank-turned, rosined wheel rubbing against the strings. The wheel functions much like a violin ...
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bow, and single notes played on the instrument sound similar to those of a violin. Melodies are played on a keyboard that presses tangents—small wedges, typically made of wood—against one or more of the strings to change their pitch. Like most other acoustic stringed instruments, it has a sound board and hollow cavity to make the vibration of the strings audible.
Most hurdy-gurdies have multiple drone strings, which give a constant pitch accompaniment to the melody, resulting in a sound similar to that of a violin. For this reason, the hurdy-gurdy is often used interchangeably or along with bagpipes, particularly in Occitan, Catalan, Cajun French and contemporary Asturian, Cantabric, Galician, Hungarian and Slavic folk music." - (en.wikipedia.org 01.03.2020)