Blake headlined the West Holts stage tonight
Gig will take place in Los Angeles during October
He confirmed the new music on Twitter
Sanders has already drawn support from Michael Stipe and Ezra Koenig
The acoustic rendition features an unexpected “death metal ending”
<strong></strong>Stream four songs from Bon Iver's inaugural 2016 performance
Vernon previously said the group were 'winding down'
Shabazz Palaces, Jon Hopkins and Vince Staples also set to perform at the Wisconsin festival
The Fall Creek Boys Choir return with 'Untitled 2', as featured on Vernon's festival mixtape
Song dates back to 2009 or 2010