Music

The music inside the Doom engine's WAD files is not stored as standard MIDIs, but as MUS, a format very similar to standard MIDI, and created by John Carmack.

All of the music in Doom and Doom II was created by Bobby Prince. Many of the songs were inspired by or closely mirror popular rock and metal songs from groups such as Slayer, Metallica, Megadeth, Pantera, AC/DC, Alice in Chains, and Black Sabbath. In Final Doom, the music was created by Jonathan El-Bizri, Josh Martel, Tom Mustaine, and L.A. Sieben.

Virtually all of the music in Doom and Doom II is of a metal or industrial nature, and follows the Twelve-Bar Blues structure.

All the music in Heretic and Hexen series was created by Kevin Schilder of Raven Software.

All the music in Strife was created by Morey Goldstein (credited as "Morey Goldstien" [sic]).

The Chex Quest music was created by Andrew Benson. For Chex Quest 3, additional tracks were created by Andrew Benson and Stephen &quot;Strife&quot; DiDuro.

The Sonic Robo Blast 2 music was created by Jarel Jones. Some music tracks are modified from Sega Genesis.

The music in PlayStation Doom and Doom 64 was created by Aubrey Hodges and shows a dramatic departure from the original PC songs; instead of MIDI-based rock songs, Hodges composed a soundtrack of eerie, disturbing ambient tracks meant to increase a sense of fear with the player (this is done easily in Doom 64 to correspond with the game's darker style). When Quake was released for the Nintendo 64, it used a style of music identical to Doom 64, going so far as to use the same samples.

Music from PWADs
Sometimes PWADs have cover versions of hit songs in MIDI format.

Here is a list of YouTube links to MIDI cover versions featured in PWADs:
 * "Jingle Bells (traditional) (as heard in the SANTA.WAD deathmatch level for DOOM II as well as the H2H XMAS megawad)
 * "YMCA" by The Village People (as heard in Doom II's mall deathmatch level in MALL.WAD)

Music listings

 * Doom music
 * Doom II music
 * Unused Doom music
 * Final Doom TNT music
 * Final Doom Plutonia music
 * Heretic music
 * Hexen music
 * Strife music
 * Chex Quest music
 * Sonic Robo Blast 2 music