U2 accused of 'devaluing music' with iTunes giveaway

U2 have been blasted for "devaluing music" by giving away their new album.

The 'One' rockers' decision to make their 'Songs of Innocence' LP free on iTunes has been criticised by the Entertainment Retailers Association (ERA) as being "as damaging as piracy" and alienating to fans who don't use Apple software.