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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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Views from the Choir Loft

Andrew Leung • Article Archive

Andrew Leung graduated from the sacred music program of Franciscan University of Steubenville, majored in vocal performance. He has also studied organ, choral conducting and Gregorian chant with world-class musicians. Prior to returning to Hong Kong, he served as a parish music director in Atlanta, and later as the organist and choirmaster at the Cathedral of Macau, China. Andrew is currently the music director of Vox Antiqua, conductor of the Cecilian Singers and music director at Our Lady of China Church. He is also an artist and vocal coach at the Paul Phoenix Academy.—Read full biography (with photographs).

Andrew Leung · August 4, 2016

St. Josemaría and the Mass

These pictures can prove St. Josemaría’s love for the Old Mass.

Andrew Leung · July 28, 2016

Free Recordings • British Boys’ Choir

Free recordings of famous British boys’ choirs on YouTube!

Andrew Leung · July 23, 2016

Saints and the “Ad Orientem” Worship

What did the saints say about celebrating the Holy Sacrifice of the Mass facing East?

Andrew Leung · July 21, 2016

Summer Sacred Music Workshop • This Weekend!

The Summer Sacred Music Workshop 2016 is finally here!

Andrew Leung · July 18, 2016

“I Desire Mercy, Not Sacrifice”

How can we renew the liturgy with charity? We shouldn’t seek to win arguments on the liturgy.

Andrew Leung · July 14, 2016

Three False Ideas about “Ad Orientem” Celebration

Three common misconceptions about the Mass and “ad orientem” worship.

Andrew Leung · June 23, 2016

Made in China

Gregorian Chant pew cards in Hong Kong.

Andrew Leung · June 16, 2016

A Guardian of the Sacred Tradition in the South — Part 2

Why is the Basilica community so lively and why are they growing so much?

Andrew Leung · June 10, 2016

St. Agnes in NYC Entrusted to Opus Dei

The Church of St. Agnes in Manhattan will be placed under the care of Opus Dei.

Andrew Leung · June 9, 2016

My Recent Discovery

I recently discovered some amazing Choral Works by Philip Stopford.

Andrew Leung · May 26, 2016

A Guardian of the Sacred Tradition in the South

The Basilica of Sts. Peter & Paul is a Guardian of the Sacred Tradition and a great Patron Sacred Music and Arts.

Andrew Leung · May 19, 2016

Summer Sacred Music Workshop 2016

Southeastern Sacred Music presents Summer Sacred Music Workshop 2016.

Andrew Leung · May 12, 2016

Feast of Bl. Álvaro del Portillo

Blessed Álvaro del Portillo, the successor of St. Josemaría Escrivá and Prelate of Opus Dei.

Andrew Leung · May 5, 2016

Video • Mass during WW2

Vintage video of an army chaplain celebrating Mass during World War II.

Andrew Leung · May 2, 2016

Video • Cardinal Burke on the Traditional Latin Mass

Here is what Cardinal Burke has to say about the Latin Mass.

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Corpus Christi Watershed

President’s Corner

    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book was placed in the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —Jeff Ostrowski
    Like! Like! Like!
    You won’t believe who recently gave us a “like” on the Corpus Christi Watershed FACEBOOK PAGE. Click here (PDF) to see who it was. We were not only sincerely honored, we were utterly flabbergasted. This was truly a resounding endorsement and unmistakable stamp of approval.
    —Jeff Ostrowski
    PDF Download • “Atténde Dómine”
    Although it isn’t nearly as ancient as other hymns in the plainsong repertoire, Atténde Dómine, et miserére, quía peccávimus tíbi (“Look down, O Lord, and have mercy, for we have sinned against Thee”) has become one of the most popular hymns for LENT—perhaps because it was included in the famous Liber Usualis of Solesmes. This musical score (PDF file) has an incredibly accurate version in English, as well as a nice version in Spanish, and also the original Latin. Although I don’t claim to have a great singing voice, this morning I recorded this rehearsal video.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    PDF Chart • “Plainsong Rhythm”
    I will go to my grave without understanding the lack of curiosity so many people have about the rhythmic modifications made by Dom André Mocquereau. For example, how can someone examine this single sheet comparison chart and at a minimum not be curious about the differences? Dom Mocquereau basically creates a LONG-SHORT LONG-SHORT rhythmic pattern—in spite of enormous and overwhelming manuscript evidence to the contrary. That’s why some scholars referred to his method as “Neo-Mensuralist” or “Neo-Mensuralism.”
    —Jeff Ostrowski
    PDF • “O Come All Ye Faithful” (Simplified)
    I admire the harmonization of “Adeste Fideles” by David Willcocks (d. 2015), who served as director of the Royal College of Music (London, England). In 2025, I was challenged to create a simplified arrangement for organists incapable of playing the authentic version at tempo. The result was this simplified keyboard arrangement (PDF download) based on the David Willcocks version of “O Come All Ye Faithful.” Feel free to play through it and let me know what you think.
    —Jeff Ostrowski

Random Quote

“Place the missal in the hand of the faithful so that they may take part more easily and more fruitfully in the Mass; and that they faithful, united with the priest, may pray together in the very words and sentiments of the Church.”

— Ven. Pope Pius XII

Recent Posts

  • Which Mass?
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  • PDF Download • “Pange Lingua” in Simple (Contemporary) Polyphony for Three Voices
  • PDF Download • “Gregorian Chant Booklet” mailed by Pope Saint Paul VI to every bishop
  • My Response Surprised A Parishioner ‘Upset’ About Latin

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