Music

The music inside the Doom engine's WAD files is not stored as MIDIs, but as MUS, a format similar to MIDI 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.

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

Trivia

 * Many user-made WAD files feature MIDI renditions of eurodance songs from the 90s.

Music listings

 * Doom music
 * Doom II music
 * Final Doom TNT music
 * Final Doom Plutonia music
 * Heretic music
 * Hexen music
 * Strife music