Infiltrate

Infiltrate is a song included in the Halo 3: Original Soundtrack. It runs for 3:50. It plays during the level Sierra 117, and includes the tracks Infiltrate and Move On. A variation of it is heard at the end of Crow's Nest.

It starts with a low strings note, with drums playing background. High strings play and hold a note, but drums continue to play melody. The song picks up the pace, and louder drums join in. At 1:47, strings begin to play the melody, which is in a minor key but has a hint of major in it. Choir also joins in, but strings and drums still keep the melody, which alternates between major and minor. This melody continues until the end.

Trivia

• When the bass begins followed by the three percussive sounds, seven such percussion sets follow before the percussion suddenly becomes high-pitched and then returns to normal. This is another 7 reference. Strangely enough, it never happens again in the song.