Performers at the Australian event, which takes place in Adelaide, include brother-and-sister act Angus and Julia Stone, Afro Celt Sound System and indie-folk harpist Joanna Newsom.
Afro Celt Sound System member Amadou Bagayoko told the ABC: "It's always a pleasure to go to Australia. We love the audience there."
Other performers who have already been confirmed are punk-reggae performer Don Letts, Britain's Norman Jay, Nigerian singer Asa, band Juan De Marcos Afro-Cuban All Stars and Irish musician Imelda May.
The event's organiser Annette Tripodi said: "I think we still stand out from the crowd in being a very fresh programme and a really unusual combination of some bigger known and contemporary names that perhaps are doing other festivals as well."