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Corpus Christi Watershed

Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”

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Missa Rex Genitor • Mass for Three Equal Voices
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Missa Rex Genitor • Mass for Three Equal Voices

ISSA REX GENITOR is a polyphonic Mass Setting for three equal voices by composer Kevin Allen. You can view a live recording here.

Click here to purchase this musical score.   ($18.00)

NOTE: Price is just $10.00 per book for those ordering ten copies or more!  Scroll to the bottom of the page to learn how.

KYRIE ELEISON   •   Video (equal voices)

PRACTICE VIDEO (Tenor I Predominant)

PRACTICE VIDEO (Tenor I Muted)

PRACTICE VIDEO (Tenor II Predominant)

PRACTICE VIDEO (Tenor II Muted)

PRACTICE VIDEO (Bass Predominant)

PRACTICE VIDEO (Bass Muted)

GLORIA IN EXCELSIS DEO   •   Video (equal voices)

PRACTICE VIDEO (Tenor I Predominant)

PRACTICE VIDEO (Tenor I Muted)

PRACTICE VIDEO (Tenor II Predominant)

PRACTICE VIDEO (Bass Predominant)

PRACTICE VIDEO (Bass Muted)

CREDO IN UNUM DEUM   •   Video (equal voices)

PRACTICE VIDEO (Tenor I Predominant)

PRACTICE VIDEO (Tenor I Muted)

PRACTICE VIDEO (Tenor II Predominant)

PRACTICE VIDEO (Tenor II Muted)

PRACTICE VIDEO (Bass Predominant)

PRACTICE VIDEO (Bass Muted)

SANCTUS, SANCTUS, SANCTUS   •   Video (equal voices)

PRACTICE VIDEO (Tenor I Predominant)

PRACTICE VIDEO (Tenor I Muted)

PRACTICE VIDEO (Tenor II Predominant)

PRACTICE VIDEO (Tenor II Muted)

PRACTICE VIDEO (Bass Predominant)

PRACTICE VIDEO (Bass Muted)

AGNUS DEI   •   Video (equal voices)

PRACTICE VIDEO (Tenor I Predominant)

PRACTICE VIDEO (Tenor I Muted)

PRACTICE VIDEO (Tenor II Predominant)

PRACTICE VIDEO (Tenor II Muted)

PRACTICE VIDEO (Bass Predominant)

PRACTICE VIDEO (Bass Muted)

BULK PRICING:

To take advantage of the bulk pricing ($10.00 per book) you must email us, specifying the amount of books you wish to purchase. You will then be forwarded information on how to proceed.

You must purchase a minimum of ten (10) booklets to take advantage of bulk pricing.

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Corpus Christi Watershed

President’s Corner

    New Bulletin Article • “14 September 2025”
    My pastor requested that I write short articles each week for our parish bulletin. Those responsible for preparing similar write-ups may find a bit of inspiration in these brief columns. The latest article (dated 14 September 2025) discusses OFFERTORY ANTIPHONS and contains a wonderful quote by Archbishop Fulton J. Sheen.
    —Jeff Ostrowski
    PDF Download • Draft Copy (Pamphlet)
    A few days ago, I posted a draft copy of this 12-page pamphlet with citations about the laity’s “full, conscious, and active participation.” Its basic point or message is that choir directors should never feel embarrassed to teach real choral music because Vatican II explicitly ordered them to do that! We’ve received tons of mail regarding that pamphlet, with many excellent suggestions for improvement. Please feel free to chime in!
    —Jeff Ostrowski
    “Entrance Chant” • 23rd (Ordinary Time)
    This coming Sunday, 7 September 2025, is the 23rd Sunday in Ordinary Time (Year C). You can download the “Entrance Chant,” conveniently located at the feasts website. I also recorded a rehearsal video for it (freely available at the same website). The Communion Chant includes gorgeous verses in FAUXBOURDON. I attempted to create a rehearsal video for it, and it’s been posted at the feasts website, called by some: “church music’s best kept secret.”
    —Jeff Ostrowski

Quick Thoughts

    Karl Keating • “Canonization Questions”
    We were sent an internet statement (screenshot) that’s garnered significant attention, in which KARL KEATING (founder of Catholic Answers) speaks about whether canonizations are infallible. Mr. Keating seems unaware that canonizations are—in the final analysis—a theological opinion. They are not infallible, as explained in this 2014 article by a priest (with a doctorate in theology) who worked for multiple popes. Mr. Keating says: “I’m unaware of such claims arising from any quarter until several recent popes disliked by these Traditionalists were canonized, including John XXIII, Paul VI, and John Paul II. Usually Paul VI receives the most opprobrium.” Mr. Keating is incorrect; e.g. Father John Vianney, several centuries ago, taught clearly that canonizations are not infallible. Archbishop Fulton J. Sheen would be another example, although clearly much more recent than Saint John Vianney.
    —Corpus Christi Watershed
    Vatican II Changed Wedding Propers?
    It’s often claimed that the wedding propers were changed after Vatican II. As a matter of fact, that is a false claim. The EDITIO VATICANA propers (Introit: Deus Israel) remained the same after Vatican II. However, a new set of propers (Introit: Ecce Deus) was provided for optional use. The same holds true for the feast of Pope Saint Gregory the Great on 3 September: the 1943 propers (Introit: Si díligis me) were provided for optional use, but the traditional PROPRIA MISSAE (Introit: Sacerdótes Dei) were retained; they weren’t gotten rid of. The Ordo Cantus Missae (1970) makes this crystal clear, as does the Missal itself. There was an effort made in the post-conciliar years to eliminate so-called “Neo-Gregorian” chants, but (contrary to popular belief) most were retained: cf. the feast of Christ the King, the feast of the Immaculate Conception, and so forth.
    —Corpus Christi Watershed
    Solemn “Salve Regina” (Chant)
    How many “S” words can you think of using alliteration? How about Schwann Solemn Salve Score? You can download the SOLEMN SALVE REGINA in Gregorian Chant. The notation follows the official rhythm (EDITIO VATICANA). Canon Jules Van Nuffel, choirmaster of the Cathedral of Saint Rumbold, composed this accompaniment for it (although some feel it isn’t his best work).
    —Corpus Christi Watershed

Random Quote

The effectiveness of liturgy does not lie in experimenting with rites and altering them over and over, nor in a continuous reductionism, but solely in entering more deeply into the word of God and the mystery being celebrated. It is the presence of these two that authenticates the Church’s rites, not what some priest decides, indulging his own preferences.

— Liturgicae Instaurationes (1970)

Recent Posts

  • “Novus Ordo Parish … With Polyphony?” • Is that possible? How specifically does that work?
  • “The Injustice of Traditionis Custodes” • (Private Meetings at the Vatican)
  • New Bulletin Article • “14 September 2025”
  • PDF Download • Croft’s “Canonic Kyrie” (SATB)
  • Karl Keating • “Canonization Questions”

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