You certainly can't tell an Australian by the way they look, but the minute they open their mouths, the guessing is over. The cultural DNA in this country is in the sound of the way Australians speak. But why do we speak the way we do? And what exactly is the Australian accent? These and other issues are brought to the screen in The Sounds of Aus - the national conversation we had to have. It premieres Thursday 8 November, 8.30pm on ABC TV.