Gordon also sings and plays didgeridoo, trumpet, tuba, and piano. Modern performances using the didgeridoo include combining it with beatboxing. On the track "I Know", Schultzberg played didgeridoo as well as drums. The didgeridoo (; also spelt didjeridu) is a wind instrument. It is a key component of much Australian Aboriginal music through the didgeridoo. Some players augment this sound with vocalizations, didgeridoo style, and even circular breathing. Many instruments are taught, including obscure ones such as the didgeridoo. This project employs unconventional instrumentation like Rhodes and didgeridoo. Wallis Buchanan on didgeridoo was also considered as a distinctive element to their musical style. At the time singer/guitarist/didgeridoo player Chris was ill and could not attend. The demo was recorded without didgeridoo player Wallis Buchanan. Schenscher is skilled at playing the didgeridoo. Mark Atkins on "Didgeridoo Concerto" (1994) plays for over 50 minutes continuously. He was also taught to play traditional didgeridoo. The most famous feature of their music is the didgeridoo.