The 'Doom' song is therefore used in both secret levels and during the cast sequence.

In the version of Doom II included in Doom 3: BFG Edition, D_EVIL and D_ULTIMA are copies of D_DOOM.'Waiting for Romero to Play' was used instead of ' Dark Halls' for E1M3 in an unreleased beta, as seen during a Visit to id Software.It can perhaps be surmised that D_DDTBLU is the 'correct' version of the track. In-game it will either play for the length of the whole final measure, or hang indefinitely in the latter cases it will either prevent the song from looping, or the note will persist across all further loops of the song. Seems like Bobby recorded all notes manually instead of placing them down. (EDIT: Also, original Doom's MIDIs usually don't have notes lined up perfectly, even when the existing 120 BPM is correct. It's not a big problem as it's pretty much unnoticable. The final note in the song's lead melody is the correct length in D_DDTBLU, while in D_DDTBL2 and D_DDTB元 it appears to be of infinite length (in General MIDI this is defined as 546 bars and 15 tics). It works pretty great, though it's possible notes will end a tick sooner or late.The instrument on the descending tones that repeat every two bars throughout the song is changed for the sixth 'repeat' of the song in D_DDTBLU (to a kalimba), and is not for D_DDTBL2 and D_DDTB元 (where it remains the instrument from the fifth repeat - FX 2 (soundtrack)).The intro passage is an extra measure long in D_DDTBL2 and D_DDTB元.A cymbal crash can be heard at the very beginning of D_DDTBL2 and D_DDTB元, which is absent from D_DDTBLU.

Taylor Blues', which is present thrice in the IWAD, exists in two slightly different versions:

The inspirations for the tracks noted above are substantiated by metadata comments found in the unreleased MIDI tracks released by John Romero, many of which are alternate versions of the MIDI tracks used in Doom.

Wolfenstein 3D - Ultimate Conquest (E3M9/E6M9 music) Wolfenstein 3D - Zero Hour (E6M4/E6M8 music) Two of the tracks are re-adapted by Prince from his earlier work on Wolfenstein 3D. At least some of these are known to have originally been written for Doom. The soundtrack of Doom II consists of music in MUS format composed by Robert Prince. Please discuss planned edits on the talk page to ensure consensus before making extensive changes. Information added here will be held to the highest standards and will be required to include citations or supporting evidence. The topic of this article is a common source of contention.

Doom 1 and 2 midis