NPD has released its most recent report examining digital music downloads in the United States. The research firm reports that Apple continues to hold a 63% share of the market down from 66% in 2010, with Amazon at 22%, up from 13% 3 years ago. Some 44 million Americans bought at least one song last year, with NPD saying that number has remained stable over the past three years. “Since the launch of Apple’s iTunes store, digital music downloads have become the dominant revenue source for the recorded music industry and iTunes continues to be the dominant retailer,” said
