[quote="Glorthac, post:1, topic:210794"]
So I went online to try to find mp3 versions of the hymns we sing at Mass, and it seems as if there are multiple ways to sing certain hymns (you know, same words, different tune). It seems as if my parish follows the Mass of Light versions of the hymns.
So... is like the Mass of Light like a sub-type of the OF Mass? What is the Mass of Light?
In case it wasn't clear from the answer above, anyone can compose a setting of the ordinary of the Mass -- those are the parts that generally stay the same from week to week: the Kyrie, Gloria, Sanctus, memorial acclamation, "Great Amen," etc. A collection of musical versions of those pieces that are intended to go together is what people call a "Mass setting." But the composer can put any name he likes on it (just like if he wrote a hymn), and the general custom for naming a Mass setting is to call it "Mass of _" (or in Latin, "*Missa _*"). So "Mass of Light" is not a sub-type of the OF Mass, it's the name a composer chose for his version of the musical settings to certain parts of the Mass.
Does that make sense?