• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Corpus Christi Watershed

“A much greater source of anxiety to Us is the style of action of those who maintain that liturgical worship should shed its sacred character, who foolishly say we should substitute for sacred items & furnishings ordinary common things in daily use.” —Pope Saint Paul VI (14 Oct 1968)

  • Donate
  • Our Team
    • Our Editorial Policy
    • Who We Are
    • How To Contact Us
    • Sainte Marie Bulletin Articles
  • Pew Resources
    • Brébeuf Catholic Hymnal
    • Jogues Illuminated Missal
    • KYRIALE • Saint Antoine Daniel
    • Campion Missal, 3rd Edition
    • Repository • “Spanish Music”
    • Ordinary Form Feasts (Sainte-Marie)
  • MUSICAL WEBSITES
    • René Goupil Gregorian Chant
    • Noël Chabanel Psalms
    • Nova Organi Harmonia (2,279 pages)
    • Roman Missal, 3rd Edition
    • Catechism of Gregorian Rhythm
    • Father Enemond Massé Manuscripts
    • Lalemant Polyphonic
  • Miscellaneous
    • Site Map
    • Secrets of the Conscientious Choirmaster
    • “Wedding March” for lazy organists
    • Emporium Kevin Allen
    • Saint Jean de Lalande Library
    • Sacred Music Symposium 2023
    • The Eight Gregorian Modes
    • Gradual by Pothier’s Protégé
    • Seven (7) Considerations
Views from the Choir Loft

Rehearsal Videos • “O Magnum Mysterium” (Victoria)

Jeff Ostrowski · December 7, 2015

953 O Magnum Mysterium Victoria IKE MANY of his fellow composers, TOMÁS LUIS DE VICTORIA (†1611) was a Roman Catholic priest. 1 His distinctive religious sensibility was apparent in his compositions, and a striking example is his setting of the Responsory for the Octave Day of Christmas:

    * *  O Magnum Mysterium (PDF)

I’ve created rehearsal videos for each voice to help amateur choirs. It can be a bit frightening to tackle such a masterpiece—and sometimes feels like “rushing in where angels fear to tread”—but hopefully these practice videos help:

EQUAL VOICES : YouTube   •   Mp3 Audio

SOPRANO : YouTube   •   Audio

ALTO : YouTube   •   Audio

TENOR : YouTube   •   Audio

BASS : YouTube   •   Audio

Renaissance composers frequently (but not always) left it up to the singers to add the sharps and flats. The rules for “musica ficta” are fairly straightforward, but—as many Renaissance theorists pointed out—problems arise when the various rules conflict.

Many editions of Victoria’s O Magnum Mysterium have a sharp for the Sopranos in measure 21 but a natural for Tenors in measure 20, even though they sing the exact same phrase. Here’s the Tenor line in a 1582 manuscript:

959 TENOR 1583b


There are reasons why Tenors might not sing a sharp—while the Sopranos do—but there are more compelling reasons why they ought to match. When I looked at a 1572 manuscript, I found that missing sharp for the Tenors:

958 O Magnum Mysterium Victoria 1572


Now I will reveal the “dirty little secret” about musica ficta: we prefer it how we learned it. In other words, we tend to prefer a piece the way we sang it the first time. For example, some editions have the Sopranos in measure 42 singing a natural—not a sharp—and there are compelling reasons for this; but in my edition, I keep the “traditional” way.

For those of you who know this piece, have you ever sung directly from the part book? Here’s how the TENOR would have been sung in the 16th century.



NOTES FROM THIS ARTICLE:

1   Cristóbal de Morales (†1553), Costanzo Porta (†1601), Lodovico Viadana (†1627), and Gregorio Allegri (†1652) were all clerics, and many more composers could be mentioned.

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

Filed Under: Articles Tagged With: Tomas Luis de Victoria Composer Last Updated: January 1, 2020

Subscribe

It greatly helps us if you subscribe to our mailing list!

* indicates required

About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

Primary Sidebar

Corpus Christi Watershed

President’s Corner

    “What Martin Luther Said…”
    My pastor asked me to write little columns for the bulletin each week. The article for 20 July 2025 has been posted, and it’s called: “What Luther Said…” Martin Luther (an ex-priest and apostate) was an infamous heretic whose ignorance of JESUS CHRIST was only exceeded by his filthy and disgusting vulgarity.
    —Jeff Ostrowski
    “Music List” • 15th in Ordinary Time (Year C)
    Some have expressed interest in perusing the ORDER OF MUSIC I prepared for the 15th Sunday in Ordinary Time (13 July 2025). If such a thing interests you, feel free to download it as a PDF file. As always, the Responsorial Psalm, Gospel Acclamation, and propers for this Sunday are also provided at the the feasts website.
    —Jeff Ostrowski
    15th Sunday in Ordinary Time (Year C)
    This coming Sunday—13 July 2025—is the 15th Sunday in Ordinary Time (Year C). All the chants have been conveniently assembled and posted at the feasts website. The OFFERTORY, Ad Te Levávi, is particularly beautiful.
    —Jeff Ostrowski

Quick Thoughts

    Pope Pius XII Hymnal?
    Have you ever heard of the Pope Pius XII Hymnal? It’s a real book, published in the United States in 1959. Here’s a sample page so you can verify with your own eyes it existed.
    —Corpus Christi Watershed
    “Hybrid” Chant Notation?
    Over the years, many have tried to ‘simplify’ plainsong notation. The O’Fallon Propers attempted to simplify the notation—but ended up making matters worse. Dr. Karl Weinmann tried to do the same in the time of Pope Saint Pius X by replacing each porrectus. You can examine a specimen from his edition and see whether you agree he complicated matters. In particular, look at what he did with éxsules fílii Hévae.
    —Corpus Christi Watershed
    Antiphons Don’t Match?
    A reader wants to know why the Entrance and Communion antiphons in certain publications deviate from what’s prescribed by the GRADUALE ROMANUM published after Vatican II. Click here to read our answer. The short answer is: the Adalbert Propers were never intended to be sung. They were intended for private Masses only (or Masses without music). The “Graduale Parvum,” published by the John Henry Newman Institute of Liturgical Music in 2023, mostly uses the Adalbert Propers—but sometimes uses the GRADUALE text: e.g. Solemnity of Saints Peter and Paul (29 June).
    —Corpus Christi Watershed

Random Quote

Is this the dumbest statement ever written? “When considering texts for his motets, Gombert obtained his inspiration from Scripture—such as the Psalms—as opposed to the liturgy of the Roman Catholic church.”

— Wikipedia

Recent Posts

  • PDF Download • “Jeff’s Mom Joins Our Fundraiser”
  • “Musicam Sacram” (5 March 1967) • Does It Apply?
  • “What Martin Luther Said…”
  • “Music List” • 15th in Ordinary Time (Year C)
  • Worship the Lord in Holy Attire

Subscribe

Subscribe

* indicates required

Copyright © 2025 Corpus Christi Watershed · Isaac Jogues on Genesis Framework · WordPress · Log in

Corpus Christi Watershed is a 501(c)3 public charity dedicated to exploring and embodying as our calling the relationship of religion, culture, and the arts. This non-profit organization employs the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.

The election of Pope Leo XIV has been exciting, and we’re filled with hope for our apostolate’s future!

But we’re under pressure to transfer our website to a “subscription model.”

We don’t want to do that. We believe our website should remain free to all.

Our president has written the following letter:

President’s Message (dated 30 May 2025)

Are you able to support us?

clock.png

Time's up