Legacy is the fourth track included in the Halo 4: Original Soundtrack.
Halo Waypoint Variant
The first 1:11 of the song is the same as the normal variant. After this point, the main vocal becomes closer and louder. the background chorus becomes quieter. It stays this way until about 1:26 when the main vocal stops for a moment. At 1:33, she returns with one other singer, harmonizing. It stays that way until 2:03 when they stop singing and echo into the chorus. The main vocal returns at 2:12 for one final time before all vocals quickly fade out and the song ends.
It can be heard during the level Requiem when the player enters the first Forerunner structure, which houses the cartographer.