The didgeridoo (also known as a didjeridu or didge) is a wind instrument developed by Indigenous Australians of northern Australia around 1,500 years ago and still in widespread use today both in Australia and around the world. It is sometimes described as a natural wooden trumpet or "drone pipe". Musicologists classify it as a brass aerophone.

There are no reliable sources stating the didgeridoo's exact age. Archaeological studies of rock art in Northern Australia suggest that the people of the Kakadu region of the Northern Territory have been using the didgeridoo for less than 1,000 years, based on the dating of paintings on cave walls and shelters from this period. A clear rock painting in Ginga Wardelirrhmeng, on the northern edge of the Arnhem Land plateau, from the freshwater period shows a didgeridoo player and two songmen participating in an Ubarr Ceremony.

A modern didgeridoo is usually cylindrical or conical, and can measure anywhere from 1 to 3 m (3 to 10 ft) long. Most are around 1.2 m (4 ft) long. The length is directly related to the 1/4 sound wavelength of the keynote. Generally, the longer the instrument, the lower the pitch or key of the instrument.

Rolf Harris, CBE, AM (born 30 March 1930) is an Australian musician, singer-songwriter, composer, painter and television personality.

Born in Perth, Western Australia, Harris was a champion swimmer before studying art. He moved to England in 1952, where he started to appear on television programmes on which he drew the characters. He also began a musical career initially with the piano accordion. He wrote the famous song "Tie Me Kangaroo Down, Sport", and when performing in Canada he introduced his popular routine around his song "Jake the Peg". He often uses unusual instruments in his performances: he plays the didgeridoo, has been credited with the invention of the wobble board, a rhythmic percussion instrument, and was associated with the Stylophone, a small electronic keyboard instrument.

From the 1960s he has become a popular television personality, presenting shows including Rolf's Cartoon Club, Animal Hospital and various programmes about serious art. In late 2005 he painted an official portrait of Queen Elizabeth II, which was the subject of a special episode of Rolf on Art.

Richard David James (born 18 August 1971), best known under the pseudonym Aphex Twin, is a British electronic musician and composer. He founded the record label Rephlex Records in 1991 with Grant Wilson-Claridge. He was described by The Guardian as "the most inventive and influential figure in contemporary electronic music."

Aphex Twin has also recorded music under the aliases AFX, Blue Calx, Bradley Strider, Caustic Window, DJ Smojphace, GAK, Martin Tressider, Polygon Window, Power-Pill, Prichard D. Jams, Q-Chastic, Tahnaiya Russell, The Dice Man, Soit-P.P., and speculatively The Tuss.

Aphex Twin has released recordings on Rephlex, Warp, R&S, Sire, Mighty Force, Rabbit City, and Men Records.

Richard David James was born to Welsh parents Lorna and Derek James in St. Munchin's Limerick Regional Maternity Hospital, Ireland. He grew up in Lanner, Cornwall, enjoying, along with two older sisters, a "very happy" childhood during which they, according to James, "were pretty much left to do what [they] wanted." He "liked growing up there, being cut off from the city and the rest of the world". James attended Redruth School, located in Redruth, Cornwall.

Chad Matthew Butler (born 24 March 1974, Amsterdam, Netherlands) is the drummer for the band Switchfoot which he co-founded along with Jon and Tim Foreman in 1996. Butler lived in Amsterdam for a few years, but he and his family later moved to San Diego, California where he now lives with his wife Tina (whom he married in 1999), his three children, Evan (born in 2001) and Dylan, and his daughter, Charlotte (born in summer of 2007). He is currently teaching his eldest to play the drums, and enjoys taking all his kids out to the beach.

As a kid, Butler dreamed of being a doctor but in Junior High, he developed an interest in drumming when he received his first drum set. He met future bandmate Jon Foreman on their high school water polo team and the two became friends.

Butler is a '97 UCSD Alumnus and earned a History of Science degree, a Business degree and taught surfing. Chad played in a variety of local bands throughout college, before joining with Jon and Tim Foreman to form the band Chin Up, later to be known as Switchfoot.