The Norwegian based duo Royskopp are among the latest names confirmed for Oya Festival.
Chairlift, whose music has been used in the latest iPod advert, will also perform at the five-day event.
Today's confirmations join the likes of Arctic Monkeys, Satyricon and Kare And The Cavemen as well as Bon Iver, Crystal Antlers and Monotonix.
Oya Festival 2009 will take place at Middelalderparken, Oslo in Norway from 11-15 August.
Four-day passes are already available priced at NOK 1,850. Day tickets are yet to go on sale.
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