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The economic and legal characteristics of the value of artistic authenticity are reviewed. Artistic authenticity is shown to be a social norm resulting from the expressive needs of minorities. Underground, popular music creators are defined through the study of a device (FIP, or “feasible identification project”) and a more distant positioning in view of the stylistic and musical mainstream. The ability to innovate and the desire to develop an original approach are planned with a strange and irrational capacity to communicate with other device producers. Creators’ intercommunication, device/FIP activation, peer networks creation, and imitation refusal indicate, in a sociological way, the value of authenticity in these kinds of activities.