Nielsen Soundscan has released their report on sales and airplay for calendar year 2011. Full release here, some notes below:

– Total album sales rose 1%, to 330.57M units, the first increase YOY since 2004.

– It was the first time that digital music outsold physical, accounting for 50.3% of all purchases.

– Adele’s “21” was the No. 1 album in 2011, selling 5.82M copies. It was also the highest-selling digital album of all time, moving 1.8M units.

– For the first time, total music purchases reached the 1.6B mark for the year.