.S3M File Extension
File TypeScreamTracker 3 Module
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an S3M file?
Audio module format used by Scream Tracker 3.0 and later; contains sound samples and music patterns, which define what notes are played back by the samples; similar to a .MOD file, but allows up to 16 tracks.
Scream Tracker v.1 and 2 saved songs as .STM files. The newer S3M format is more versatile and more widely supported. All three versions were originally developed by Future Crew.