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A Swedish Bockhorn
A bukkehorn (Norwegian) or bockhorn (Swedish), also called ″Billy Goat Horn″ in English, is an ancient Scandinavian musical instrument, made from the horn of a ram or a goat. The horn is usually made from a goat horn harvested 5 to 7 years before the instrument is crafted. It was traditionally used by shepherds and milkmaids on summer dairy farms in the mountains, as a signal-instrument or as a scaring instrument. When the horn later got finger holes it became possible to play melodies with it. The instrument has two blowing-techniques: the trumpet-principle is the most common, but the clarinet-principle is also used.