The document discusses changes in the music industry over time as revenues have declined but music consumption has increased. It attributes the revenue decline to shifts in how people access and listen to music, from physical formats to digital. New services like Napster, iTunes, YouTube and Spotify provided convenient digital access to music for free or low cost, which impacted revenue streams. Streaming services in particular have grown rapidly and now drive most digital revenue, though artist royalties per stream are much lower than from other sources. Sustainable business models are needed that satisfy customers desire for easy, free access while also generating sufficient revenue to fairly compensate all industry stakeholders.