Plunderphonics is a term coined by composer John Oswald in 1985 in his essay Plunderphonics, or Audio Piracy as a Compositional Prerogative. It has since been applied to any music made by taking one or more existing audio recordings and altering them in some way to make a new composition. Plunderphonics can be considered a form of sound collage.Although the concept of plunderphonics is seemingly broad, in practice there are many common themes used in what is normally called plunderphonic music.