There are both styles - moder and traditional - on the CD.
Of the traditional ones there is a song Budal Lardil from the Mornington Island, from the people who have lived there since before the last ice age. The song played by Wayne Williams Woonan and Lance Gavenor Gagawun has been received directly in dreams.
Another traditional singer on CD is Alan Maralung who has received his songs from two spirits: Bunggridj-bunggridj, a small bird, and Balandjirri, the ghost of deceased Songman. The song on CD came from the bird spirit, who gave Maralung most of his songs. His songs are of Wangga tradition and contain more imporvisation than modern Wangga songs and it is said that he might have been the last representative of older tradition of singing.
As much I understand, other songs on CD are of modern tradition.