Reversed messages

In the Halo 2 song Mausoleum Suite, a mysterious voice chants. If this mumbling is reversed (listen), a voice is heard saying:

...I have walked among men and angels for three thousand years. Time has no end... no beginning... no purpose.

I wander the earth, seeking forgiveness for my horrible crimes against God and man.

I live to see death, destruction, over the light, but the light cannot be extinguished.

I live in a prison of my own demise.

I am lost in time...

The voice is speculated to be Gravemind, however, this is up to debate. The voice is heard during the cutscene before The Arbiter, the level Gravemind when you rescue the Marines, and during The Great Journey when you fight Tartarus.

Recently, however, Marty O'Donnell, in a post on the Halo.Bungie.Org forums, stated that he wondered "why the transcript [of the reversed message] is still wrong." This seems to indicate that changes must be made to the transcript before it is accurate.