Digeridoo is an EP by the musician Richard D. James under the alias Aphex Twin. All tracks were re-released on the Classics compilation. "Isopropophlex" and "Analogue Bubblebath" are reprints of tracks from Analogue Bubblebath 1. "Digeridoo" was previously released as "Aboriginal Mix" on the Analogue Bubblebath 2 EP. "Flaphead" and "Phloam" are the only new tracks on the EP.
"Digeridoo" 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). "Flaphead" on the CD version of the EP is extended by about 20 seconds compared to the vinyl version (here titled "Flap Head").