The complete mechanical reproduction of musical works has literally crumbled the concept of 'original' in the course of time, as the conscience of the equally full manipulability of individual songs, through access to their Online, has led to consider the enormous sound produced to date as an endless mine of material that you can chop, mix and reconstruct in an original way. This process of composition produces significant results for over twenty years, with roots in many avant-garde and experimentation of the twentieth century, but only in recent times, thanks to the technologies implemented on personal computers, it could become a widespread practice, not bound by geographical limits. Often it's the pop star to be chosen for handling the most luxurious, if only for the recognition of their songs even after the bold distortions imposed by the overlap and changes of time. Among the groups that do so are carrying out an action not only artistic, but also teaching against the major music companies and their greed of revenue related to copyright, there are Beatallica . The band maintained a strict anonymity (for obvious legal reasons) and play Beatles songs in the style of Metallica, influencing expressly also the original texts. With two albums in assets, distributed free online, the duo has achieved a broad consensus of public, free to enjoy music released by the absurdity of copyright, because formally composed as a parody and then right in the middle of the authors. But because of the success and the resulting numbers of online distribution, Sony Music has first filed a lawsuit for breach of copyright, later divested through the intercession of Lars Ulrich, drummer of Metallica, contacted by members of the anonymous band of Milwaukee. But there are many possible techniques to create sonic artifacts from famous songs, with more and more are being designed and developed to get new compositional results. Particularly original, as is the approach of Oh Astro (aka Jane Dowe, another name), an American artist who programmed their own software then uses in his work. 'Hello World' (released for Illegal Art) is the last album produced in this manner, in which all of the tracks were composed from material Aesop Rock, Ennio Morricone and Miss Elliot, among others. The result is a pop alien, blurred but familiar, something that is affected by some influence 'automatic', but it cuts both an inspiration and originality out of the question. As also the 'plunderphonics', ie pull together many champions short to achieve unexpected results, starting with the first major albums released by its creator, John Oswald, whose famous album' plunderphonic 'is, years later, freely downloadable from its official website. And the artist himself, in one of his first and fundamental theoretical writings, described his technique as "audio piracy as a compositional prerogative." And what may seem provocative quest'accostamento it perfectly sums up the spirit of re-appropriation of the past and of creation in mind that these accumuna sound artists.