ON’T tell anyone this, but our choir changes two notes in the Gradual for Septuagesima Sunday. It’s a clivis that just doesn’t sound right. Here it is in the Editio Vaticana, as printed by Solesmes Abbey (1957):
The 1953 Schwann Gradual, which also contains the Editio Vaticana, prints the “error” as well:
Dom Pothier’s 1883 Liber Gradualis—which served as the basis for the Editio Vaticana—also contains the “error,” as you can see:
Dom Mocquereau’s 1903 Liber Usualis, published before the Editio Vaticana appeared, also contains the “error,” to my great surprise:
Is there a “Gregorian Chant Jail” for people who change the notes?
I hope not!
For the record, this chant contains a very clear outline of a Tritone:
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