Bourdon
(bor-DOHN)
[Fr.]
A drone. A pipe or string producing a constant pitch. It is analogous to the English "burden", used to describe the lowest drone on the hurdy-gurdy and the low-pitched, free vibrating strings of the larger lutes such as the theorbo and bowed instruments such as the lira da braccio; also the lowest partial ("hum note") of tower bells.
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