The 2011 Digital Music Report from IFPI (International Federation of the Phonographic Industry), identifies crucial issues facing the music industry (mainly reducing illegal downloads), details the statistical data for downloads and record sales for top artists, and suggests recommendations for policy change and consumer education to reduce music piracy.
This page of thee RIAA website is dedicated to informing students of the impact of illegal downloading on the music industry and details the devastating financial impact.
This blog suggests that declining revenue streams in the music industry have been impacted greatly by video game sales and not just illegal music downloads.