is a computer file format
used primarily to represent music
, and was the first module file
format. MOD files use the “.MOD” file extension
, except on the Amiga
where the original trackers instead use a “mod.” prefix scheme, e.g. “mod.echoing”. A MOD file contains a set of instruments
in the form of sample
, a number of patterns
indicating how and when the samples are to be played, and a list of what patterns to play in what order.
The first version of the format was created by Karsten Obarski for use in the Ultimate Soundtracker
software released for the Amiga
computer in 1987. The format has since been supported by hundreds of playback programs
and dozens of other trackers
The original version of the MOD format featured four channels of simultaneous audio playback, corresponding to the capabilities of the original Amiga chipset
, and up to 15 instruments.
Later variations of the format have extended this to up to 32 channels and 31 instruments.
The format was designed to be directly playable on the Amiga without additional processing: for example, samples are stored in 8-bit PCM
format ready to be played on the Amiga DAC
, and pattern data is not packed. Playback required very little CPU
time on an Amiga, and many games used MOD files for their background music
A common misconception is that the magic number
"M.K." in the 0x438 offset of MOD files are the initials of Mahoney and Kaktus, two prominent Amiga demosceners at the time,... Read More