Digital music revenues worldwide rose nearly 7% last year to hit $6.85 billion, tying physical sales in share for the first time, at 46% each.
The majority of US mobile users surveyed in December 2013 said they listened to mobile music at least sometimes, and around half of that group played songs often.
This infographic from Sol Republic illustrates how we discover and enjoy music in the age of social media.
Forty percent of tablet owners report they use it to listen to music, while 56 percent of smart phone users say they use it for music listening.
Advertising revenues, which already make up the bulk of US mobile music revenues, will gain an even greater share in the coming years, eMarketer forecasts, and by 2016 will account for more than 86% of all such revenues.
While online and mobile music revenues are expected to show strong growth rates in both the US and globally this year, physical music sales are projected to be down by 9% in the US, and 12% globally.