Plunderphonic 作曲 is a 特定 radical 形（曲）式 of 拼贴 in which all 材料 have been appropriated from existent 音乐 It is a politically motivated 风格 which is focused on the 概念 of 自由 采样 and challenging 感知（认为） hypocrisy of 音乐 copyright 定理 The 术语 is 派生 from the seminal CD by John Oswald called 掠夺之声