Mark Kennedy is an Australian musician who has been the drummer for several artists including Spectrum (1969–70), Doug Parkinson in Focus (1971), Leo de Castro (1971–73), Ayers Rock (1973–76), Marcia Hines (1976–83), Men at Work (1985), Renée Geyer and Jimmy Barnes (2005).

James Vivian Alfred Doyle was an Australian musician, radio presenter and songwriter. He was the founding mainstay guitarist in Ayers Rock (1973–81), a jazz fusion, progressive rock band. As a member of Ayers Rock, Doyle appeared on all three of their studio albums, Big Red Rock (1974), Beyond (1976) and Hotspell (1980). They toured both nationally and internationally including through the United States, where they supported Bachman–Turner Overdrive at a stadium concert with an audience of 35,000 people in Seattle. For the group's third album, Hotspell, Doyle wrote or co-wrote four tracks.