The first version of the format was created by Karsten Obarski for use in the Ultimate Soundtracker, tracker software released for the Amiga computer in 1987.
in the 0x438 offset of MOD files are the initials of Mahoney and Kaktus, two prominent Amiga demomakers at the time, who played an important part in the popularity of the format.
[4] After the Amiga's production ceased, the MOD format has had continued popularity in the Demoscene and as background music for independent video games and Chiptunes.
Each row in the pattern data lasts one vertical blanking (or 0.02 seconds) times the current speed setting.
In later versions of the format, the vertical blanking was replaced with an adjustable time period staying in the range [0.01, 0.078] seconds.