MIDI Instrument Definition File

A MIDI Instrument Definition File is a RIFF like container that remaps the General MIDI patch set and drum note assignments for a MIDI sound source that is not GM compliant.^[1]

Identification

.IDF files start with ASCII "RIFF", have "IDF LIST" at offset 8, and MMAPhdr at offset 20. ^[2]

Software

• Microsoft's IDFedit Program
• RIFFPad

Sample files

• dexvert samples — other/midiInstrumentDefinitionFile

External links

• Wikipedia:MIDI
• Windows 95's MIDI Mapper

References

1. ↑ https://docs.isy.liu.se/pub/VanHeden/DataSheets/The_MIDI_Specification.pdf
2. ↑ ftp://curscott.servebeer.com/Download/Apps/_Microsoft/Visual%20Studio%206.0%20Professional%20MSDN/SAMPLES/VC98/SDK/GRAPHICS/AUDIO/IDFEDIT/GLOBALS.H