When the track is played backwards, a hidden message can be heard.[1] The message alludes to the Ur-Didact's speech from the Halo 4's Epilogue.
“
We squander eons in the darkness While they seize our triumphs for their own The Mantle of Responsibility for all things belongs to Forerunners alone Think of my acts as you will Do not doubt the reality The Reclamation has already begun We are hopeless to stop it.