on it Change the volume or special effect being applied to the current note Change pattern flow; jump to a specific song or pattern position or loop inside a pattern Do nothing; any existing note playing in this channel will continue to play An instrument is a single sample along with an optional indication of which portion of the sample can be repeated to hold a sustained note. Timing In the original MOD file the minimum time frame was 0.02 seconds, or a "vertical blanking" (VSync) interval, because the original software used the VSync timing of the monitor running at 50 Hz (for PAL) or 60 Hz (for NTSC) for timing. The rate at which pattern data is played is defined by a speed setting. Each row in the pattern data lasts one vertical blanking (or 0.02 seconds) times the current speed setting. The speed setting varied from 1 to 255. In later versions of the format, the vertical blanking was replaced with an adjustable time period staying in the range [0.01, 0.078] seconds. The old speed setting command was replaced with a new one that was used to change both the old speed setting and the new adjustable time period. Unfortunately, some of the old functionality was broken, because the new speed setting command had an identical code value to the old command. Values in the range [1, 31] were interpreted as the old speed settings, but other values were regarded as modifications to the adjustable time period. Hence, values in the range [32, 255] used in some old songs broke in new versions of the player. Further information on the MOD format can be found at the alt.binaries.sounds.mods FAQ. Other formats that use the MOD extension MOD is the file extension for several other applications: The video file format used on many digital camcorders, such as the JVC Everio, the Canon FS100 and the Panasonic D-Snap SD-card camcorders. Game modules in Neverwinter Nights. AMPL model files. Old phpBB modification templates. Module files in Femap The extension for the binary variant of the Wavefront .obj format. The extension for some games using the Vassal game engine. The extension for Fortran module files. The extension for legacy Visual Basic module files, for versions before the release of Visual Basic .NET. The extension for Go module files, used for package versioning. Module for ABB Robotics IRC5 and S4 robot controllers. Contains