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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

PDF Download • Organ Interludes Based on Plainsong (Manuals Only) — 104 pages!

Andrea Leal · August 15, 2022

XCITING NEWS! Mr. Stephen Perez is offering a terrific collection of modal organ interludes as a free PDF download. Many of these interludes are based on the most beloved Gregorian chant melodies: Pange Lingua, Ave Maris Stella, Lauda Sion, Puer Natus, Creator Alme Siderum, Ave Maria, Vidi Aquam, Vexilla Regis, Veni Creator Spiritus, Assumpta Est Maria, and so forth. The selections were chosen with great care, including marvelous composers such as Flor Peeters, Dom Gregory Murray, Dom Alphege Shebbeare, John Lee, Oreste Ravanello, J.S. Bach, and many others. Best of all, these interludes are within reach of the ‘average’ organist, since they are for manuals only.

*  PDF • Organ Interludes (Manuals Only) • 104 Pages
—Based on Gregorian Melodies • Edited by Mr Stephen Perez.
*  Amazon Softcover (Eligible for Prime) • $9.99

Full title of the publication:

M  Simple Organ Interludes (Manuals Only)
M  In honor of Father Énemond Massé (d. 1646)
M  Including modal compositions based on plainchant melodies.
M  For use in the Catholic Church.

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48117-Organ-Interludes-Enemond-Masse-Manuals-Only

Dom Gregory Murray’s pieces are particularly beautiful. My parish is currently without an organist, since the person who had been serving as our organist recently entered the seminary. I asked my colleague, Jeff Ostrowski, to record a few of the Murray interludes, so readers can get an idea what they sound like. Mr. Ostrowski chose to record INTERLUDE 37—based on Sanctus VIII—as well as INTERLUDE 59.

Our Own Organ Interludes

E ARE IN THE MIDST of our own publication project. We ask Catholic composers to consider submitting organ interludes you have written! I will email you a release form by which you give us legal permission to use your composition(s). Although you retain your copyright, we humbly request that you refrain from publishing your piece until three years after our book appears in print. Below are the composers who have already contributed pieces to our forthcoming collection:

M  Josep Solé Coll
M  Kevin Allen
M  William Fritz
M  Dr. Gregory Hamilton
M  Richard J. Clark
M  Andrew Leung
M  Father David Friel
M  Dr. Lucas Tappan

To submit your organ interlude(s), please email:

Don’t forget to write ‘organ interlude submission’ in the subject line of your email. Please try to submit your pieces over the next few months.

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

Filed Under: Articles, Featured, PDF Download Tagged With: Catholic Organ Interludes, Catholic Organ Voluntaries, Dom Gregory Murray 100 Organ Interludes, Free Organ Interludes Chant, Free Organ Preludes, Organist Interludes, PDF Organ Voluntaries, PDF Pipe Organ Interludes, Plainsong Improvisation Organ Last Updated: September 16, 2022

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About Andrea Leal

Andrea Leal is a wife and homeschooling mother of 6 children. She serves as choir director for the Traditional Latin Mass in Las Vegas.—(Read full biography).

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Corpus Christi Watershed

President’s Corner

    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday—1 March 2026—the 2nd Sunday of Lent (Year A). If such a thing interests you, feel free to download it as a PDF file. As always, the Responsorial Psalm, Gospel Acclamation, and Mass Propers for this Sunday are available at the flourishing feasts website alongside the official texts in Latin.
    —Jeff Ostrowski
    Particularly Beautiful
    The 2nd Sunday of Lent has magnificent propers. Its INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    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 ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    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

“It is most important that when the faithful assist at the sacred ceremonies … they should sing alternately with the clergy or the choir, as it is prescribed.”

— ‘Pope Pius XI, Divini Cultus (20 Dec 1928) §9’

Recent Posts

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  • Extreme Unction
  • Which Mass?

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