S3M File

What are S3M files and how to open them

Are you having problems opening a S3M file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your S3M files.

What is a S3M file?

A .S3M file is a Scream Tracker 3 Module file.

A Scream Tracker 3 Module (file extension .s3m) is an audio file type used to store musical compositions made in the Scream Tracker 3 program, a popular tracker (music sequencer) for DOS by Future Crew. These files contain patterns of notes, instrument samples, and effect commands rather than raw audio, allowing composers to build complex multi-layer compositions while keeping file sizes small.

The format supports up to 99 instruments and both digital sample playback (PCM) and FM-synthesized instruments via OPL (AdLib-style) chips. It allows up to 32 channels of audio output, precise tuning of samples by specifying the sample rate for middle C, a separate volume column in pattern data, and optional stereo panning. Effects beyond the simple MOD format are included.

Internally the file begins with a song header including title and metadata, followed by instrument and pattern pointers. The instrument structures include sample length, loop points, default volume, sample format flags (such as 16-bit or stereo), and the sample's middle-C playback rate. Pattern data and then sample data follow. A recognizable signature: the ASCII text "SCRM" appears at offset 44 (or as a signature string used in the format) which helps tools identify the file type.

How to open S3M files

We have identified one S3M opener that is compatible with this specific type of S3M file.

Programs that open Scream Tracker 3 Module files

Last updated: August 13, 2026

Various apps that use files with this extension

These apps are known to open certain types of S3M files. Remember, different programs may use S3M files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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