As Radiohead prepare to enter the studio in September to begin work on the follow-up to 2011's The King of Limbs, the band released a surprise update to their "exploratory audio-visual" PolyFauna app on September 1. Whereas the first version of the app, released in February 2014, used samples and imagery from The King of Limbs, this update features all-new atmospheric soundscapes and trippy terrains.

The music itself, which often features Thom Yorke harmonizing with the beats, is unfamiliar to Radiohead fans, and could hint at what the group has planned as they start work on their ninth studio album.