These are different names for the same instrument. It is one of the aged musikinstruments of human history.
The yedakis in the indigenius cultur of australian Aboriginal-People
were only known in Arnhemland, in North-Australia.
Althought this site has its focus on didgeridoos, made by people who are (mostly not) Aboriginals, we will have in mind, that those are the "parents" and the beholder of the yedaki and the oldest living cultur of mankind.
In priciple, the yedaki is a tube, in which throught the lipp-vibration
a standing wave is developed.
That is the theorie. The australian yedakis are mostly made of eucalyptus-branches.
Little Termites hollow out the living tree by eating the wood. Normaly
the tree is staying alive. Only in the last stages it dies.
Beside the well known Aboriginal-makers like Djalu
Guruwiwi, David Blanasi and many many more, there are also some
white australien didge-makers, who know this very well, e.g. Bruce
Thill or David Howell.
last change 2003-12-21