.IGP File Extension
Igor Published Music Notation File
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What is an IGP file?
File created by Igor Engraver, a music notation application; stores the sheet music for a musical composition and may specify different instrumental parts; can be downloaded in a demo state, viewed with the Igor Reader application (also called NoteHeads Reader), and then purchased over the Internet using Igor Reader.
The music in IGP files can also be played audibly in the Igor Reader software. This is because IGP files store MIDI information that can be played back by the computer's MIDI system or by a sampler device that is connected to the computer. The IGP format is officially called the "Igor Publishing" format.
NOTE: Igor Reader is no longer available for download.