Notation Interchange File Format (NIFF) is a music notation file format used primarily for transferring music notation between different scorewriters.
The NIFF project was started in February 1994 to create an open format that would allow exchange of music between various scanning / Music OCR, editing and typesetting programs. The project was sponsored by several music notation software publishers.
The NIFF format itself is based upon RIFF (Resource Interchange File Format), a file structure provided by Microsoft, in which data is divided into Lists, Chunks and Tags. Almost all data in a NIFF file are optional. The level of detail contained can range from just the pitch and timing (akin to MIDI) to a precise page layout, embedded graphics and embedded MIDI information.
Though detailed and comprehensive, the standard never really caught on except for limited interchange between music OCR software and scorewriting software. Three of the music OCR programs in widespread use – PhotoScore, SharpEye, and SmartScore – export NIFF files. NIFF is now considered obsolete mainly due to the MusicXML format. As of February 2006 the NIFF project web site has been closed. The NIFF SDK is available at the The NIFF SDK Archive for educational usage.
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