The document discusses the music industry and audiences in the 1970s and 2000s. In the 1970s, subcultures like hip hop, disco, punk rock, and skinhead youth culture emerged. The sexual revolution and films like Saturday Night Fever contributed to controversies around disco music. Punk rock emerged as a radical rejection of pop music. In the 2000s, subcultures included emo music and post-punk rock. New technologies like Napster, MP3s, iPods, blogs, and YouTube challenged the music industry business model and led to the industry's decline as people moved away from buying CDs.