Video game launches don’t get bigger than Halo 5: Guardians. The game is set for a launch this October, and it’ll act as Microsoft’s crown jewel for the Xbox One this fall. Everything from graphics to multiplayer modes are important in a game launch this big. In a new video from GameInformer, 343 Industries shows off some of the work it’s doing to refresh the game’s audio design.

The video piece goes into great detail with Halo 5: Guardians’ audio design team and composers. Both 343 Industries audio director Sotaro Tajima and computer Kzuma Jinnouchi provide a detailed look at what they’re doing to keep the Halo sound fresh while refreshing classic franchise favorites. For example, 343 Industries took a trip to a European church known for creating sound so that they could record a new version of the chants composer and audio director Martin O’Donnell for the first game.

The piece lasts a solid 5 minutes. Those exited for Halo 5: Guardians should find the video very interesting. At this year’s Electronic Entertainment Expo Microsoft revealed a new multiplayer mode created specifically for the Xbox One. Called, Warzone, it’ll let 24 players battle each other and enemies.