Unheard track included in Record Store Day version of new album 'Indie Cindy'
Californian festival takes place over next two weekends
The band will release their first studio album in 23 years, 'Indie Cindy', on April 28
US band will play live at the Eden Project in Cornwall on July 9
New song is taken from 'EP-3' release ahead of 'Indie Cindy' LP
'Indie Cindy' will comprise of the band's three recent EPs and will be released on April 28
'The Root' video was shot in a Dayton, Ohio supermarket
The track features on the band's 'EP-2', which was released on January 3
Royal Blood and reunited Starsailor also among first line-up additions for July event