of the trilogy. The tracks are presented, similarly to the previous soundtrack for Halo 2, in a suite form. Unlike previous soundtracks, where much of the music had been synthesized on computer, the soundtrack for Halo 3 was recorded using a 60-piece orchestra, along with a 24-voice chorus. The final soundtrack was recorded by the Northwest Sinfonia at Studio X in Seattle, Washington. The soundtracks were bundled and released as a box set in December 2008. A soundtrack for Halo 3: ODST was released alongside the game and included many of the tracks from the game. For Bungie's last game in the Halo series, Halo: Reach, Martin O'Donnell and Michael Salvatori returned to compose the soundtrack. O'Donnell wrote "somber, more visceral" music to reflect the darker nature of the campaign and style of the game. As Bungie had been making Halo 3: ODST and Halo: Reach at the same time, Martin O'Donnell had also been composing the soundtracks at the same time, but production for the music of Halo: Reach did not begin until after the release of Halo 3: ODST. The soundtrack was released on iTunes on September 15, 2010, and in a two-disc set on September 28, 2010. For Halo Wars, the task of creating the game's music fell to Stephen Rippy. Rippy listened to O'Donnell's soundtracks for inspiration and incorporated the Halo theme into parts of his arrangements. In addition to synthesized and orchestral components, the composer focused on the choir and piano as essential elements, feeling these were important in creating the "Halo sound". Rather than use the Northwest Sinfonia, Rippy traveled to Prague and recorded with the FILMharmonic Orchestra before returning to the United States to complete the music. A standalone compact disc and digital download retail version of the soundtrack was announced in January 2009 for release on February 17. The music of Halo 4 was composed by Neil Davidge and Kazuma Jinnouchi. The Halo 4 Original Soundtrack was released on October 22, 2012, followed by a two-disc Special Edition on November 6. Neil Davidge served as an out-of-house composer for 343 Industries which proved to be very expensive leading Kazuma Jinnouchi to take over the responsibility of music production for Halo 5: Guardians. The music by Neil Davidge and Kazuma Jinnouchi for Halo 4 received mixed reviews, being recognized as creative music but too different from the original Halo formula. In 2014, Kazuma