Guberman, Daniel. Post-Fidelity: A New Age of Music Consumption and Technological Innovation. Journal of Popular Music Studies, Volume 23, Issue 4, pp 431–454
Guberman divides the history of recorded music into two distinct sections: the fidelity era, stretching from Thomas Edison through the invention of the compact disk, and the post-fidelity era, beginning with the iPod. He argues that, since about 2001, the listening public has come to value convenience, variety, personalization and curation over sound quality.
An emblematic image of the late fidelity era: the Maxell advertisement showing a wealthy young man in his home, sitting deep in an easy chair with a martini, getting physically blown away by giant, powerful speakers.
The emblematic image of the post-fidelity era: silhoutted people of both genders and diverse backgrounds, dancing with iPods.