In this episode, Peter continues the tale of the first format wars with radio\u2019s sudden mass market emergence in the 1920s and discusses three of the early superstars of recorded music: Enrico Caruso, Bert Williams and Al Jolson.\nBuy the book and support the podcast.\nDownload this episode.\nHave a question or a suggestion for a topic or person for Nate to interview? Email letitrollpodcast@gmail.com\nFollow us on Twitter.\nFollow us on Facebook.\nLet It Roll is proud to be part of Pantheon Podcasts.\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices