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, the most prominent user is maybe the St. Peter's Abbey of Solesmes. 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. More information...
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