Along with working with acts like Pan Sonic, Throbbing Gristle, and Sunn O))), Icelandic composer and cellist Hildur Guðnadóttir made music for last year’s Joker: Folie À Deux as well as other films like Tár. Today, she’s announcing a new experimental supergroup called Osmium with engineer and producer James Ginzburg, Senyawa vocalist Rully Shabara, and sound designer and producer Sam Slater.