1. Introduction: Breaking Sound Barriers– Gustavus Stadler
2. Sound, Knowledge, and the "Immanence of Human Failure": Rethinking Musical Mechanization through the Phonograph, the Player-Piano, and the Piano–David Suisman
3. Deaf Jam: From Inscription to Reproduction to Information–Mara Mills
4. Splicing the Sonic Color-Line: Tony Schwartz Remixes Postwar Nueva York–Jennifer Stoever-Ackerman
5. Never Heard Such a Thing: Lynching and Phonographic Modernity–Gustavus Stadler
6. Can You Feel the Beat?: Freestyle's Systems of Living, Loving, and Recording–Alexandra T. Vazquez
7. Buzz and Rumble: Global Pop Music and Utopian Impulse–Jayna Brown