The document discusses the history of music distribution from the late 18th century to present day and how different distribution methods have impacted the music industry and listeners over time. It outlines major milestones like the phonograph, sheet music, radio, tapes, CDs, Napster, iTunes and how each led to changes like a loss of live performances or physical products. The conclusion questions if future digital distribution will change copyright law and how that may impact the quality of music, sound and accessibility.