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Human Machine Interfaces MIDI
Developer: Human Machine Interfaces
Header: HMI
Content: Notational
Instruments: External
Target Output
Output - Digital Audio - No.png Output - MIDI.png Output - FM Synthesis.png Output - PSG - No.png
Released: 1995-06-15
First Game: ?
  • *.hmi

Human Machine Interface (HMI) is a MIDI-like format named after the company that created it, Human Machine Interfaces. The format is derived from the earlier HMP format. The format was used by the Sound Operating System middleware library for audio playback, a competitor of XMI used in the Miles Sound System.




Released Title Sample
1995-08-?? Abuse (DOS)
1995-??-?? Witchaven (DOS)
1995-??-?? The Terminator: Future Shock (DOS)
1996-08-31 The Elder Scrolls II: Daggerfall (DOS)
1996-??-?? The Terminator: SkyNET (DOS)
1996-??-?? Witchaven II: Blood Vengeance (DOS)
1997-06-30 Carmageddon (DOS)
1997-07-15 X-COM Apocalypse (DOS)

Although Carmageddon features several MIDI tracks in HMI format on its CD-ROM, they are not actually used in-game.

How to Obtain

HMI files usually have to be extracted from game resource files, but are sometimes kept separate.


All HMI files begin with "HMI-MIDISONG061595". There are no known further upgrades to the format.