HMI

Unknown

audio

Human Machine Interfaces HMI File is a MIDI variant file format created by Human Machine Interfaces Inc. It supports looping and conditional branching. It was used by Human Machine Interfaces Sound Operating System as the MIDI system and is used in several PC games including The Elder Scrolls II: Daggerfall, Carmageddon and Tex Murphy: Overseer.

Identify it

Extensions	`.hmi`
MIME types	`application/octet-stream`
Signatures	`484d492d4d494449534f4e47303631353935` at byte 0 (Human Machine Interfaces HMI File) `484d49` at byte 0
PRONOM	`fmt/1843`
Wikidata	`Q27967382`

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Sources

File Formats Wiki
PRONOM fmt/1843
Wikidata Q27967382

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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