Cult Icelandic act Sigur Ros have posted demos and outtakes to music-sharing site Soundcloud.

Pitchfork reports that many of these cuts have been circulating for a while, but Sigur Ros have now assembled them in one place.

There are demos, live versions, and “manipulations” of some of their tracks from the 2000 breakthrough album Agaetis Byrjun.

There’s a demo of ‘Svefn-g-englar’ from 1999, live versions of ‘Flugufrelsarinn’ and “Ny Batteri’ from 1998, plus four extended versions and three sonic manipulations of tracks from Agaetis Byrjun.

svefn-g-englar 1999 demo by sigur rós

ágætis byrjun demos by sigur rós

ágætis byrjun manipulations by sigur rós

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