Warp20 (Unheard) is an eleven-track collection of secret treasures rediscovered from the Warp vaults, stretching across the entire 20 year span of the label's history.

The unheard and rare pieces include Boards of Canada's near-mythical 'Seven Forty Seven' (the first music Mike and Marcus have let out since Trans Canada Highway in May 2006), pre-Incunabula era Autechre, Broadcast (a Nico cover 'Sixty Forty' performed for a John Peel session) and *Nightmares on Wax* (DJ E.A.S.E. and Boy Wonder productions from the time of Dextrous) to name just a few.