The album is written by Björk with five of the 14 songs co-written by Arca and one of the songs co-written by Sarah Hopkins. All of the songs except one is co-produced by Arca. One of the songs is co-produced by Rabit. Björk formed a twelve piece Icelandic female flute orchestra, which she arranged for and conducted. She also wrote an arrangement for Hamrahlíðarkórinn, a choir conducted by Þorgerður Ingólfsdóttir. The album was edited and structured by Björk on Protools. It was engineered by Bergur Þórisson, Bart Migal and Chris Elms. It was mixed by Heba Kadry and Marta Salogni Salogni and mastered by Mandy Parnell.