The recent, non-Aboriginal name, didjeridu (didgeridoo, digerydoo), was probably derived from sound made by this lip-buzzed aerophone. The availability of bamboo in the north-west of the Northern Territory suggests that the first Australian instruments, their sounds and their players belonged to this region. In a recent chronology of the rock art of the Arnhem Land Plateau, depictions of the didjeridu have been placed within the post-estuarine period. In the process of its intrusion into Arnhem Land within the last 1,000 years or less, the didjeridu may have helped to preserve vestiges of earlier musical styles. See 18-1076. -- AATA