A tour through the birth and re-births of audio recording technology, and how the media of listening to music have shaped, exploded, and rearranged the ways in which people make the music itself. The categories are the four distinct epochs of sound recording: (1) The Acoustic Era; (2) The Electric Era; (3) The Magnetic Era; (4) The Digital Era. Featuring music from Mamie Smith, Les Paul & Mary Ford, Madonna, and more.