Mausoleum Suite

200px|right Mausoleum Suite is a suite of songs included in the Halo 2: Original Soundtrack. It includes Destroyer's Invocation, Falling Up, Infected, and Shudder. Part of this song, which plays when the Arbiter gets his armor, is often referred to as the "Arbiter's Theme,"as it is always played in Halo 2 during Arbiter missions. The first part of the song is the same as Ancient Machine.

It runs for 8:10.

Hidden Message
When the track is played backwards, a hidden message can be heard. At normal speed it is inaudible, but sounds similar to the Gravemind's voice. However, when sped up words can be heard and the voice begins to sound like that of a Prophet. It is more likely that it is 032 Mendicant Bias because Gravemind or the prophets wouldn't be seeking for forgiveness nor does Gravemind do anything that may warrant a reference to "living in a prison of [his] my own demise", but this may be a reference to his being trapped on Delta Halo. Whether either is the owner of the mysterious voice, or something/someone else is debatable.