... the most important part is that this is the only way of keeping a record which cannot be called a 'frame-up'—for it is a photograph of the sound waves. A grafter, a murderer, or any other criminal could be made to speak the same words in court as were put on the phonographic record, and his voice identified beyond the shadow ... — Traffic in Souls - A Novel of Crime and Its Cure • Eustace Hale Ball