Heh, we read what we want to read. This is the last paragraph in the music article:
One other thing has clearly helped the music industry claw its way back to growth – a decline in piracy. The NPD report also noted a decline in unpaid music acquisition, such as P2P file sharing and trading music on hard drives. NPD estimates that 13% of Internet users downloaded music from a P2P site in 2011, down from a peak of 19% in 2006. In addition to giving customers more legitimate sources to find music, the industry has worked hard to crack down on file sharing sites.
In other words, it was both law enforcement AND more sources that led to renewed growth.