Hildur Guðnadóttir – “Leyfðu Ljósinu (prelude)”
This astonishing piece is the work of one Icelandic woman, performed live and without any post-production. Its delicate beginning only hints at the tonal richness of the rest, in which her cello and voice (looped and layered) intermingle in otherworldly, spine-chilling fashion and gradually build to a near-frantic conclusion. The best modern chamber music I have heard in years. Listen to the whole thing here.