- IMF (music)
IMF is an
audio file formatcreated by id Softwarefor the AdLib sound cardfor use in their video games. The default filename extensionis also "imf". The abbreviation stands for "id music file" or "id's music format".
The format is similar to MIDI, in that it defines musical notes, and does not support
sampled digital audiofor sound effects. IMF files store the actual bytes sent to the AdLib's OPL2 chip, which uses FM synthesis to produce audio output. The format is based on the AdLib command syntax, with a few modifications. Due to the limited features and relatively low sound quality, modern games no longer use IMF music.
Once extracted from a game, IMF files can be played with special sound libraries which emulate AdLib cards. One of the most popular ones is
AdPlug, which can be used, for instance, through its Winampplugin.
A large number of songs in id Software's games were composed by Bobby Prince in IMF format. Besides id Software, some other game developers like
Apogee Softwarealso used this format to add music to their games. Games using IMF music include: " Bio Menace", ', ', " Catacomb 3-D", "Commander Keen" 4-6, " Corridor 7", " Cosmo's Cosmic Adventure", " Duke Nukem II", " Major Stryker", " Monster Bash", " Operation Body Count", "Spear of Destiny", and " Wolfenstein 3D".
Musical Instrument Digital Interface(MIDI)
Audio file format
* [http://adplug.sourceforge.net/ AdPlug] , library that supports the IMF file format
* [http://www.shikadi.net/moddingwiki/IMF IMF Format at ModdingWiki] , including detailed information on the format
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