PDF Download • “Corde Natus Ex Parentis” w/ Modern Harmonies (4 pages)
She said: “Jeff, you should record these harmonies with human voices, to illustrate what you mean.”
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A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He completed studies in Education and Musicology at the graduate level. Having worked as a church musician in Los Angeles for ten years, in 2024 he accepted a position as choirmaster for Saint Mary of the Immaculate Conception in Michigan, where he resides with his wife and children. —Read full biography (with photographs).
She said: “Jeff, you should record these harmonies with human voices, to illustrate what you mean.”
Jeff, thanks for the rare Gregorian accompaniments. I just love all the work you do! About 2 years ago, my parish made the decision to ditch all the contemporary Mass settings (Marty Haugen, and so forth) and to only use the Latin! We currently use the [name redacted of a disposable missal] … some of their accompaniments […]
Dear Mr. Ostrowski; I must politely disagree with your friend who said “absolutely nobody cares” about the rare books you share on the blog. The fact is, your raw enthusiasm for these resources teaches me (and presumably others) to care. I admit that sometimes the angles from which you present them—the amount of context, or […]
Dr. Peter Wagner, a famous musicologist, founded the “Gregorian Academy” in Freiburg (Switzerland).

Let us pray for the repose of the soul of Josef Ratzinger, who did so much good for the church.

Saint John Vianney, while in the presence of the Blessed Sacrament, could scarcely speak or breathe (so moved was he).

Here’s a handy organ accompaniment (PDF) in three different key signatures: MIDDLE, HIGH, and LOW. The Latin lyrics (“Silens Nox”) are courtesy of Father Valentine Young, OFM (d. 2020). The organ harmonies are very simple, yet beautiful. Those who desire such a thing may also download a Singer’s Version. For obvious reasons, the choir will […]

This morning I sat down and arranged what—in my view—is one of the beautiful Christmas carols.
A very skilled conductor from another country—who recently posted a recording any conductor would be proud of, displaying a light, pleasant, and professional choral sound—wrote to us on 23 December 2022: “CCWatershed and the Sacred Music Symposia have made a great mark in my musical career and the sound you hear you can proudly say […]

Anyone who’s ever stood in front of a choir knows the choirmaster’s vocation is not an easy one.
People often ask: “Can Gregorian Chant include the congregation?” The answer is: Yes! Listen to this Live Recording from last Sunday (which was the 4th Sunday of Advent). That is one model—not the only model—demonstrating how a congregation could be included. It’s KYRIE XVII, traditionally sung during Advent.
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In case you missed it, this December 10th article about Dr. Peter Wagner, who founded the GREGORIAN ACADEMY at Fribourg (Switzerland), has it all: (1) A rare download [138 pages] of Dr. Wagner’s Kyriale Accompaniment Book; (2) Biographical information about Dr. Wagner; (3) A special surprise you’ll love; (4) Courtesy of Professor Weaver, a translation […]

Our singers really love this one…

I didn’t have the heart to tell this fellow that the same melody occurs at other times of the liturgical year.
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Corpus Christi Watershed
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Corpus Christi Watershed is a 501(c)3 non-profit organization recognized by the state of Texas on 19 October 2006. Our statement of purpose notes that we “employ the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.”