Digital revenue comes in a variety of forms. Sales of downloaded singles and albums, from services like Apple’s iTunes, continue to grow. More promising for the industry, however, are subscription-based offerings, including Spotify, Rhapsody and Muve Music. The number of subscribers to services like these grew by 44 percent last year, to 20 million, the federation said.
In the United States, sales slipped slightly last year. But Enders Analysis, a research firm in London, predicted in a separate report published Tuesday that a turnaround there would begin this year, with revenue rising to $5.35 billion from $5.32 billion.