The didgeridoo (or didjeridu) is a wind instrument of the Indigenous Australians of northern Australia. It is sometimes described as a natural wooden trumpet or "drone pipe". Musicologists classify it as an aerophone.
A didgeridoo is usually cylindrical or conical in shape and can measure anywhere from 1 to 2 meters in length with most instruments measuring around 1.2 meters. Generally, the longer the instrument, the lower the pitch or key of the instrument. Keys from D to F? are the preferred pitch of traditional Aboriginal players.