Xbox 360. Halo 3 has also been enhanced for Xbox One X, rendering at 1920p upscaled to 2160p in HDR at a solid 30fps. Audio As with all titles on the Xbox 360, Halo 3 fully supports 5.1 surround sound audio. In the game, there are over 50,000 pieces of audio, with nearly 40,000 of those being NPC dialogue. This is far more than in either of the preceding Halo titles; Halo 2 had over 15,000 pieces of dialogue. The AI controlling this dialogue is designed to ensure the exchanges flow naturally and convincingly. Separate recordings were made for nearby and distant gunfire to make for a more believable sound experience in the public beta, and the finished game uses Waves Audio plugins to modify dialog and other audio in-game depending on conditions. Distant gunfire sounds, which may first seem like pre-recorded ambient sound, may often be the result of an actual firefight happening elsewhere in the game. Marty O'Donnell again composed the original score for the game. Some pieces of the game's music are produced with a much larger real orchestra than any pieces in the prior two games. For example, the music for the announcement trailer was recorded with a 60-piece orchestra and a 24-piece choir. Halo 3 is the first game in the series to feature custom soundtracks, allowing players to replace in-game music with their own choices. The Halo 3 Original Soundtrack was released on November 20, 2007. Included on the soundtrack is an original composition submitted by fans and judged by Nile Rodgers, Michael Ostin, and Marty O'Donnell. Voice actors returning to reprise their roles in Halo 3 include Jen Taylor as Cortana, David Scully as Sergeant Johnson and the Elites, Keith David as the Arbiter, Tim Dadabo as 343 Guilty Spark, Ron Perlman as Lord Hood, Robert Davi as Rtas 'Vadum, and Steve Downes as the voice of Master Chief. The game also features new voices, with Terence Stamp and Justis Bolding replacing Halo 2 voice actors Michael Wincott and Julie Benz as the Prophet of Truth and Miranda Keyes respectively. Additional voices include celebrity presenter Jonathan Ross, Nathan Fillion, Adam Baldwin, Alan Tudyk, Katee Sackhoff, and John DiMaggio. Members of the Halo machinima Red vs. Blue (Burnie Burns, Gus Sorola, Matt Hullum, Jason Saldaña, Geoff Ramsey, and Joel Heyman) have cameo roles. Release Microsoft spent more than $40million marketing Halo 3. The goal