The results range from very high-pitched sounds to much lower sounds involving interference between the lip and vocal fold vibrations. Adding vocalizations increases the complexity of the playing. Modern performances using the didgeridoo include combining it with beatboxing. It was featured on the British children's TV series "Blue Peter". The didgeridoo also became a role playing instrument in the experimental and avant-garde music scene. Industrial music bands like Test Department generated sounds from this instrument and used them in their industrial performances. It is very often used in the music project Naakhum which combines Extreme Metal and Ethnic music. Early songs by the acid jazz band Jamiroquai featured didgeridoo player Wallis Buchanan (until he left the band in 1999). A notable song featuring a didgeridoo is the band's first single "When You Gonna Learn", which features prominent didgeridoo playing in both the introduction and solo sections. The instrument is commonly used by ambient artist Steve Roach as a complement to his produced soundscapes, in both live and recorded formats. It features prominently in his collaborative work "" (with Australian Aboriginal artist David Hudson and cellist Sarah Hopkins) as well as "Dreamtime Return". It is used in the Indian song "Jaane Kyon" from the film "Dil Chahta Hai". Chris Brooks, lead singer of the New Zealand hard rock band Like a Storm uses the didgeridoo in some of the band's songs including "Love the Way You Hate Me" from their album "". Kate Bush made extensive use of the didgeridoo (played by Australian musician Rolf Harris) on her album "The Dreaming", which was written and recorded after a holiday in Australia. Charlie McMahon, who formed the group Gondwanaland, was one of the first non-Aboriginal players to gain fame as a professional didgeridoo player. He has toured internationally with Midnight Oil. He invented the didjeribone, a sliding didgeridoo made from two lengths of plastic tubing; its playing style is somewhat in the manner of a trombone, hence the portmanteau name. Traditionally, the didgeridoo was played as an accompaniment to ceremonial dancing and singing and for solo or recreational purposes. For Aboriginal peoples of northern Australia, the yidaki is still used to accompany singers and dancers in cultural ceremonies. For the Yolngu people, the yidaki is part of their whole physical and cultural landscape and environment, comprising the people and spirit beings which belong to their country, kinship system and the Yolngu Matha language.