RECENTLY posted a polyphonic REFRAIN and paired it with a Gregorian hymn. Some choirs will not be able to sing the polyphony right away—or perhaps ever—but can still sing the Gregorian hymn. Here’s an organ accompaniment modulating into a higher key for the final verse:
Believe it or not, this Gregorian melody gave us the Solfège names: DO RE MI FA SOL LA. Originally, they called “Do” as “Ut.” I don’t know when or why they decided to change “Ut” into “Do.” If you google “Ut queant laxis,” you can learn more about why this hymn gave us Solfège. The French don’t use Solfège, by the way. They prefer numbers.