Pop music and the way it creates identity are a central theme in Jeremy Deller’s works. The Turner Prize winner has often created non-hierarchical connections between the British working class from industrial regions, post-industrial youth cultures such as the rave movement and the art scene. In Theory and Practice, Deller continues his artistic practice of conceptually collecting everyday culture in an open Folk Archive. The work illustrates his genealogical interest in live music performances, which represent both a physical and social experience. This is the kind of experience fans have, for instance those of the teen band Take That, who are shown here. Deller used a computer to translate the acoustic phenomenon of experiencing music into diagrams. The wavelength pattern that can be seen next to a photo of an emphatic gig by the British indie band Earl Brutus represents the guitar sound of the group. The diagram shown next to the raver wearing a gas mask explains the technical process of music sampling.