Digeridoo is the first EP

Extended play

An EP is a musical recording which contains more music than a single, but is too short to qualify as a full album or LP. The term EP originally referred only to specific types of vinyl records other than 78 rpm standard play records and LP records, but it is now applied to mid-length Compact...

 from Richard D. James under his now well-known nickname "Aphex Twin". All songs from both releases were re-released on the Classics

Classics (Aphex Twin album)

Classics is an electronic music compilation album by Richard D. James, more commonly known by his pseudonym of Aphex Twin . The album was released in December 1994 ....

compilation. "Digeridoo" was previously released under the AFX nickname as "Digeridoo (Aboriginal Mix)" on Analogue Bubblebath 2

Analogue Bubblebath 2

Analog Bubblebath Vol 2 was the second EP released by artist Richard D. James, under the alias of AFX. It is also the second release in the Analogue Bubblebath series and was his first release under the AFX alias....

.

Origin

A Didgeridoo is a well-known Australian aboriginal instrument

Instrument

Instrument may refer to:* Instrument , a documentary of the band Fugazi, directed by Jem Cohen* Instruments , a performance visualizer-Science and technology:...

, although it is misspelled on the cover. The Cover also depicts Uluru

Uluru

Uluru , also known as Ayers Rock, is a large sandstone rock formation in the southern part of the Northern Territory, central Australia. It lies south west of the nearest large town, Alice Springs; by road. Kata Tjuta and Uluru are the two major features of the Uluṟu-Kata Tjuṯa National Park....

 with the silhouette of a boomerang with the sky on it.
The track doesn't actually feature a Didgeridoo, however, "eschewing samples, James labored for three days to concoct an electronic simulacrum of the primordial drone" (Simon Reynolds, Energy Flash).

CD version

1. "Digeridoo" – 7:11
2. "Analogue Bubblebath 1" – 4:44
3. "Flaphead" – 7:00
4. "Phloam" – 5:33

Vinyl version

A1. "Digeridoo" – 7:11

A2. "Flaphead" – 7:00

B1. "Phloam" – 5:33

B2. "Isoprophlex" – 6:23 (titled "Isopropanol" on Classics

Classics (Aphex Twin album)

Classics is an electronic music compilation album by Richard D. James, more commonly known by his pseudonym of Aphex Twin . The album was released in December 1994 ....

.)