Greetings All—
I've newly arranged a version of Kyrie IV for our church.

It is available in two forms:
1.) the fuller form which includes the original Gregorian invocations (to be sung by a schola) which precede the cantor / people calls and responses.
2.) a simplified version which is just the call & response of the truncated melody. This latter is great for non-choral masses & school children.

Because of how it is designed, it can be sung easily with or without the Gregorian invocations, which means that it could be used at choral & non-choral masses (basically, you could sing the simple version all the time and then embellish it when the choir is in attendance).

I decided that I wanted to do a Kyrie that was more Gregorian in essence, but since I'm trying to build up the school & church to full Gregorian ordinaries, I figured this would be a nice middle ground, where the melody is easily digestible, yet still directly derived from the structural pitches of the Gregorian original. Hearing the original and the simple versions side-by-side, it's easy to hear how the latter is descended from the former. Ultimately, this is not Kyrie IV in a strict sense; it is a distillation and choral embellishment of thereof. YMMV, but I figured a few of you here might be interested.

To get the score: https://catholicsacredmusic.com/store-1/p/kyrie4-cunctipotens-jjr

LONG form demo: https://youtu.be/G1HaXgzQbXI

SHORT form demo: https://youtu.be/kQ4jySrWedk