| Mod (file Format) |
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Information AboutMod (file Format) |
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HISTORY The first version of the format was created by and NoiseTracker . The original version of the MOD format featured four channels of simultaneous audio playback, corresponding to the Amiga hardware Capabilities Of The Time , and up to 15 instruments. Later variations of the format have extended this to up to 32 channels and 31 instruments. The format was designed to be directly playable on the Amiga without additional processing: for example, samples are stored in 8-bit PCM format ready to be played on the Amiga DAC , and pattern data is not packed. Playback required very little CPU time on an Amiga, and many games used MOD files for their Background Music . FORMAT OVERVIEW A pattern is typically represented in a sequencer User Interface as a table with one column per channel (hence 4 columns in the original SoundTracker) and up to 64 rows. Each row lasts 0.02 seconds times the current speed setting. A cell in the table can cause something to happen on its column's channel when its row's time is reached:
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. In a MOD file the minimum time frame is 0.02 seconds, because the original software used the VSync of the monitor running at 50 Hz (for PAL ) or 60 Hz (for NTSC ) for timing. OTHER MOD FORMATS MOD is also the file format used on many camcorders, such as the JVC Everio, and the Panasonic D-Snap SD-card camcorders. SEE ALSO SOFTWARE
EXTERNAL AMIGA-RELATED LINKS
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