Ah..great question
The digeridoo is an Aboriginal music instrument. It's considered very sacred to their beliefs and ONLY men are allowed to play it.
The Aboriginal people believe in what they call The Dream Time, very connected to the Earth, the animals etc.
The tree is considered a spiritual symbol for the link between physical and spirit. The digeridoo is always made from the dead branch of a tree, thus being a physical tool to connect with spirit.
The digeridoo is used for celebrations as well as sacred ceremonies. The rhythm of the digeridoo, when played correctly, is quite hypnotic and resonates a deep vibration that can be felt through your whole body...simply amazing.
To play the digeridoo, the men must breathe out continuously, while inhaling at the same time...a technique that takes a long time to master.