Introduction

 An STM file is a 4 track music file that uses digitised instruments. An
 STS file is much the same as an STM file, except that the sound data for
 the instruments is not included in the file. Thus, in order to play an
 STS file, you would need all the sample disks that are used by that
 song (there are only certain instruments that can be used in STM/STS
 files, and they are all stored on numbered disks). Note that an STM file
 is called a module, and an STS file is called a song.

 This format was orginally used by the Screamtracker program on the Amiga,
 although other trackers can probably read these files as well. There is
 also a version of Screamtracker for the PC. The information supplied here
 comes from my experimentation with this PC version, and from the docs
 included with the program.

 James Holderness