Tracker module
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Tracker modules, generally abbreviated as mods, are similar in principle to the MIDI file format, but they include their own sound samples, instead of relying on the synthesizer's built-in samples. Contrarily to MIDI, there is no single standardized format; instead each tracker software having its own format. This also means that playback needs to be done with a compatible module replayer. The most commonly used formats are known by their file extensions and include MOD, IT, XM, etc.
ZDoom supports a variety of tracker module formats listed here.
