From Halopedia, the Halo wiki
Album:
Halo: Combat Evolved Anniversary: Original Soundtrack
Composer(s):
Martin O'Donnell and Michael Salvatori
Length:
4:24
Previous:
Bravery, Brotherhood
Next:
An End of Dying
Installation 04 is a track included in the Halo: Combat Evolved Anniversary: Original Soundtrack. It is a remake of the Halo Theme from the Halo: Original Soundtrack. It also contains a remake of Siege of Madrigal and runs for 4:24.
The opening monk chant in this track is used as the intro to the menu music featured in Halo: The Master Chief Collection. It is followed by two Halo 2: Anniversary tracks; Not a Number and Unwearied Heart.