Didgeridoo is the name of the first track that Richard D. James (also known as Aphex Twin) came up with. He was a DJ at that point in time and found it difficult to get the ravers to stop dancing. Thus, this track was born.

The beat is over 150 bpm-- the song is absolutely brutal to dance to. The didgeridoo plays in the background of the entire song, and in the studio version it sounds quite sinister-- however, the live version is much more buoyant and trippy as opposed to dark. It's a classic.