Nocturnal Emissions is Nigel Ayers's sound art project that has released numerous records and CDs in music styles ranging from electro-acoustic, musique concrète, hybridised beats, sound collage, post-industrial music, ambient and noise music. Their sound art has been part of an ongoing multimedia campaign of guerrilla sign ontology utilizing video art, film, hypertext and other media, particularly collage. The project was initiated in Derbyshire in the late 1970s by Nigel Ayers, a former art student who, during the period, lived in London, together with collaborators Danny Ayers and Caroline K. In 1979. 2 CD edition of this highly influential album with over 50 minutes of previously unreleased music.