Gregorio (software)
Gregorio is a free and open-source scorewriter computer program especially for Gregorian chant in square notation. Gregorio was adopted by many abbeys and large projects. Architecture Gregorio is not a completely independent program, but consists mainly of three components: The gabc syntax for writing Gregorian scores, a TeX package named GregorioTeX, which is responsible for the graphical output and a converter tool between those two. As such, Gregorio is included in TeX Live 2016. Characteristics Gregorio is written especially for Gregorian chant in square notation and does not cover modern European musical notation. Similar to LilyPond it does not provide a graphical user interface. The notation is done via simple text input. It follows the gabc-syntax, which is defined by the Gregorio Project for this purpose. The gregorio command line tool converts this gabc-file to a GregorioTeX file, which has to be included in a common TeX file. Such a file is necessary for a graphical output, e.g., in the PDF-format. History The Gregorio project started in 2006 at TELECOM Bretagne, a graduate engineering school in France. It was at first a student project lasting six months. When the project was done, Élie Roux decided to continue the project on