The acoustic era. The inventors ; A phonograph in every home ; The international industry of recorded sound ; The music ; Recorded sound in the Jazz Age
The electrical era. The machines ; Competing technologies ; Empires of sound ; Swing and the mass audience ; High fidelity at last ; Rock'n'roll and the revolution in music ; The record ; The studio ; Perfecting studio recording ; The cassette culture
The digital era. The media conglomerates ; Into the digital era ; Consolidation and connectivity in the digital era.