edited. Megatherium was voiced through goat noises, though considerably lowered in pitch, Embolotherium were voiced by walruses and rhinos, Macrauchenia by donkeys, Indricotherium by bears and rhinoceroses and Chalicotherium by a hippopotamus. Australopithecus was initially planned to be voiced through harmonised human voices, an idea that was abandoned in favour of monkey sounds. The Woolly Mammoths were voiced by elephants and Smilodon were voiced by lions and tigers. The final sound mixing was done by Chris Burdon, who combined a total of 64 sound tracks (including narration, music, animal sounds and background noises) to produce one final stereo mix for the series. Ben Bartlett, who had previously worked on Walking with Dinosaurs, composed the music for Walking with Beasts. The composition process began with Bartlett and the directors (Jasper James and Nigel Paterson) viewing the different episodes together without sound and determining specific scenes that stood out as especially requiring music. Bartlett approached Walking with Beasts differently than he had Walking with Dinosaurs; the score in the previous series often included sophisticated themes and orchestral sweeps to reflect the grandeur of the dinosaurs. When it came to the Cenozoic, Bartlett found the era much harder to characterise, concluding that the "beasts" were less "refined" than the dinosaurs before them. As a result, the score of Walking with Beasts intentionally disobeys standard rules of sophisticated harmony, focusing on simplicity but also at times having "big blocks of sound [crashing] in uninvited". Episodes Walking with Beasts BBC One aired the series weekly on Thursday nights, with a regular of repeats the following Sunday afternoon. In 2010, the series was repeated on BBC Three in omnibus format, as three-hour-long episodes. The Science of Walking with Beasts A two-episode companion documentary, The Science of Walking with Beasts, aired in November 2001 on BBC One. This series featured interviews with palaeontologists and explanations of how the fossil record and modern day descendants have informed what is known about the animals depicted in Walking with Beasts, as well as brief sections showing the development of the CGI and animatronic animals used in the series. Reception The first airing of New Dawn, the first episode of Walking with Beasts, on BBC One attracted 8.5 million viewers and a 35% audience share. Though this fell short of the first airing of Walking with Dinosaurs (15 million viewers), it was considered a major success owing to 2001's more competitive