The existing audio was remastered using reverberation , depth , and spatial effects to enhance the overall ambiance of the game ; one example a developer from Raven made note of is that " Layering out multiple sounds now makes a big difference " . A range of other sound effects that were not present in '' Modern Warfare '' were also used , including unused audio channels that had been created for the original , but due to restraints had not been included during its development . The original music and voice performances were retained , with the exception of the campaign dialogue spoken by Al-Asad in Arabic which was amended and re-recorded , and a slight alteration in the voice acting for Zakhaev during part of a speech . Initially , the original voices of the multiplayer announcers from '' Modern Warfare '' were also changed , but this was reverted for '' Remastered '' s release following fan complaints expressed at the Call of Duty : XP 2016 where its multiplayer was first made playable . Similarly , a number of weapon sounds in the multiplayer that been altered were again revised to more accurately represent those found in the original game
Call of Duty : XP 2016
Call of Duty: Experience 2016
Call of Duty: Modern Warfare Remastered