If you want to predict how new technologies such as AI and social video will change the music industry, one way is to analyze how previous innovations impacted the business. As Steve Jobs said, "You can’t connect the dots looking forward; you can only connect them looking backwards.” Howie Singer and Bill Rosenblatt, authors of the new book "Key Changes: The Ten Times Technology Transformed the Music Industry," look at lessons from historical developments over more than a century to help us predict how the latest disruptive technologies will shake up the music business.