Audio director Scott Lawlor was responsible for the inclusion of the ambient tracks by Mark Morgan from Fallout and Fallout 2. In addition to 80 minutes of new score, Bethesda and Obsidian got the rights to integrate the previous scores from earlier Fallout games. Regarding the period tracks: 'the score for New Vegas is basically portraying more of the psychological place that we want the player to be and the songs are giving them more of the adventure of the era.' The result is 'quite a twangy, a little Western, but a very twisted western sound.' In comparison to Fallout 3, Fallout: New Vegas went for a smaller scale using sound design synthesizers, The Lyris Quartet providing the strings and a few guitars.
Inon Zur reprised his role for composing the orchestral score.
