The didgeridoo, also spelt didjeridu, is a wind instrument, played with continuously vibrating lips to produce a continuous drone while using a special breathing technique called circular breathing. The didgeridoo was developed by Aboriginal peoples of northern Australia at least 1,500 years ago, and is now in use around the world, though still most strongly associated with Indigenous Australian music. 
A didgeridoo is usually cylindrical or conical, and can measure anywhere from 1 to 3 m (3 to 10 ft) long. Generally, the longer the instrument, the lower its pitch or key. 
There are no reliable sources of the exact age of the didgeridoo. Archaeological studies suggest that people of the Kakadu region in Northern Australia have been using the didgeridoo for less than 1,000 years, based on the dating of rock art paintings. A clear rock painting in Ginga Wardelirrhmeng, on the northern edge of the Arnhem Land plateau, from the freshwater period  shows a didgeridoo player and two song men participating in an Ubarr ceremony.

Click on the photos to hear the sounds of the didgeridoo/gong/singing bowls