On Hidden, British art rock band These New Puritans used six-foot Japanese taiko drums to create its deep percussion sounds. However, the thundering percussion-led noise was too much for one headmaster, who banned his school choir from contributing to this song as he judged the music to be "too dark." Frontman Jack Barnett explained to NME January 16, 2010: "I think he objected to the implication of violence - the title 'Attack Music.' But they were a fairly professional choir who get asked to do a lot of work. The second lot were from a state school in Hackney. They were more enthusiastic about the whole idea."
The sound of knives being sharpened can be heard on this track. On Hidden Barnett experimented with a diverse array of recording tricks including the use of "Foley techniques." He explained to NME: "It's the method they use in film to develop sound effects. Like, for instance, cracking a cauliflower at the stem simulates the sound of human bone breaking."
Hidden was voted 2010 Album of the Year by the NME.