In recent years, narratives about the music industry tend to hew to a common theme: it was humming along for decades until the Internet and Napster came along and disrupted it. Key Changes shows that this view is incorrect: the industry was actually shaken up not once in the 1990s, but ten times over more than 100 years. These ten disruptions came with the introduction of new formats for enjoying recorded music: starting with the cylinders and discs played on early phonographs; then moving through radio, LPs, tapes, CDs, television, digital downloads, streaming, and streaming video; and then into Artificial Intelligence (AI), which enables a wide range of new capabilities with profound impacts upon the business. Each of the technological innovations covered in this book not only disrupted the music business, but also fundamentally altered the industry's character. Veteran music industry professionals and music technology experts Howie Singer and Bill Rosenblatt illuminate this pattern through a framework they term "the 6 Cs": cutting edge technology, channels of distribution, creators, consumers, cash, copyright. Extensively researched and supplemented by interviews with Grammy-winning artists, producers, and executives, the book provides an insightful perspective on the ways technology has fundamentally altered the music industry.