What number of studio album release did U2's Innocence + Experience Tour support?
Songs of Innocence (U2 album) Songs of Innocence is the thirteenth studio album by Irish rock band U2. Released on 9 September 2014, it was produced by Danger Mouse, with additional production from Paul Epworth, Ryan Tedder, Declan Gaffney, and Flood. The album was announced at an Apple Inc. product launch event and released the same day to all iTunes Store customers at no cost. It was exclusive to iTunes, iTunes Radio, and Beats Music until 13 October 2014, when it received a physical release on Island and Interscope Records. The digital release made the record available to over 500 million iTunes customers, for what Apple CEO Tim Cook marketed as "the largest album release of all time".
Biophilia (album) Biophilia is the seventh studio album by Icelandic singer Björk. It was released on 5 October 2011, by One Little Indian Records and distributed by Nonesuch Records in North America and by Universal Music Group in the rest of the world. Björk composed it as a concept album during the 2008–2011 Icelandic financial crisis, exploring the links between nature, music and technology. Billed as the first "app album", "Biophilia" is a multimedia project released alongside a series of apps linking the album's themes to musicology concepts. It was followed by a series of educational workshops in four continents.