Fletcher, Neville H.
The didjeridu (or yiraki) of the Australian Aborigines is a very primitive musical instrument, both historically and acoustically. It consists simply of a more-or-less straight small tree trunk or branch, typically between one and two metres long, hollowed out by the action of fire or insects to produce a roughly tapered tube. The inside diameter typically increases from about 30 millimetres at the narrow end, from which the instrument is blown, to about 50 millimetres at the wide end, and the...[Show more]
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