Ce titre a été composé et enregistré pendant le sessions de Volta. Björk ne l’a pas conservé pour la liste des chansons finales, mais le titre a été utilisé en tant que bande originale de la vidéo commémorative To lee, with love, réalisée par Nick Knight en hommage à Alexander McQueen.
Un article de Rolling Stone évoque la journée d’enregistrement de la chanson :
When the S.S. crept into Studio D at Sony Studios in New York, Björk stood amid seven French horns, belting out her latest song, “Pneumonia.” Barefoot, she seemed possessed by an otherworldly spirit, contorting her body to perfectly bend notes like only one lil’ Icelander can. “Now I’m trembling,” she told us afterward in the control room. “It’s like childbirth.” Björk was at Sony to lay down two tracks (”Trance” is the other), each a potential closer for her upcoming album, Volta. B started Volta in the autumn of 2005, focusing on creating a different mood than on her previous two discs, Medúlla and Vespertine. “I felt I was ready to be an extrovert again,” she says. “Apart from that, I just wanted to have fun.” Though she says that ninety percent of Volta was born from her sitting in front of a computer editing brass and tribal beats, the “extroverted” portion came when she invited collaborators. For instance, “Dull Flame” is a charming duet with Antony (of Antony and the Johnsons) ; for “Hope” she traveled to Mali to record with kora player Toumani Diabaté ; and on the first single, “Earth Intruders,” B teams up with Timbaland and the Congolese group Konono No. 1.
source : rollingstone.com
Björk enregistre une prise vocale de Trance à 03:47.