Dudeln: Vienna's own indoor yodelling
For many, yodelling is the sound of the Alps. Farmers used the warbling singing technique to communicate between mountain peaks.
But the Austrian capital Vienna has its own special version of yodelling, known as Dudeln.
It has been recognised by UNESCO as part of Austria's intangible cultural heritage.
Bethany Bell met the dudler singer Agnes Palmisano.
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02 Jan 2015