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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

Square Note App

Fr. David Friel · April 9, 2017

ELL PHONES and other mobile devices these days serve manifold purposes. For some, they double and triple as cameras and internet browsers. For others, they also function as gaming devices, tip calculators, searchable Rolodexes, stereo systems, navigation systems, and portable televisions. But, have you ever used your mobile device as a Graduale Romanum?

Now you can, if you would like.

Recently, I stumbled upon an app called Square Note, which markets itself to church musicians and those who wish to learn more about chant. The app allows users to see a wide array of chants, with their texts and square notation. The chants are grouped in four major sections.

First, the Mass propers for the Ordinary Form encompass the whole temporal cycle and part of the sanctoral. Secondly, Mass propers are also available for the temporal cycle of the Extraordinary Form. Also included is a Kyriale section complete with all eighteen chant Masses and six chant creeds. Finally, the app offers a collection of “Other Chants,” which includes multiple versions of the Marian antiphons, certain Eucharistic chants, and several tones for the Te Deum.

One of the most useful features of the app is its capability of searching the texts of all the chants. Searches can be limited to the titles, or incipits, of the chants, or searches may be opened to include the full text of all the chants. For students of the liturgy, this tool is especially valuable.

Another feature that can be useful is the playback mode offered for each piece. Although this would unsettle purists, I can imagine the playback being useful for beginners. The tone quality of the playback is, of course, choppy and mechanistic, so its overuse ought to be avoided. I’ve known many schola directors who will not use a piano to find pitches or sound out passages, and there is real wisdom in their approach. For some, though, the playback mode offered in Square Note could be the help they need to get off the ground. Square Note even allows the user to adjust the pitch and tempo of the playback tool.

This app is the handiwork of Fr. Matthew Spencer, O.S.J. and Bro. Stephen Spencer, O.S.J., both members of the Holy Spouses Province of the Oblates of St. Joseph in the United States of America. It is a developing product, too, as more chants continue to be added to the collections.

The app is available for $2.99 in the Apple App Store or on Google Play. Click here to explore more fully the riches of this “Rituale in your pocket.”

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

Filed Under: Articles Tagged With: Graduale Romanum Roman Gradual Propers, Gregorian Chant, Propers, Resources for training in Church music Last Updated: January 1, 2020

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About Fr. David Friel

Ordained in 2011, Father Friel is a priest of the Archdiocese of Philadelphia and serves as Director of Liturgy at Saint Charles Borromeo Seminary. —(Read full biography).

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President’s Corner

    PDF Download • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski
    “Rare Photographs” • Hannibal Bugnini
    On 2 September 2025, we included in this article extremely rare photographs of Archbishop Hannibal Bugnini taken in Iran circa 1979. Bugnini had initially been banished by the pope to Uruguay, but he refused to obey. [This is interesting, since Bugnini relied upon ‘blind obedience’ when it came to modifications of the ancient liturgy.] After he refused to obey the order from the pope, Hannibal Bugnini was banished to Iran. You can also watch a short video of Hannibal Bugnini in Iran, dated 10 November 1979. That’s about a week after the USA embassy hostage crisis began in Tehran, and Pope Saint John Paul II had sent the leader of the Iranian Revolution a special letter.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of May (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
    Simplified Version • “Canon in D” (Pachelbel)
    I published an article on 11 November 2023 called Wedding March For The Lazy Organist, which rather offhandedly made reference to a simplified version I created in 2007 for Pachelbel’s Canon. I often use it as a PROCESSIONAL for weddings and quinceañeras. Many organists say they “hate” Pachelbel’s Canon. But I love it. I think it’s bright and beautiful. I created that ‘simplified version’ for musicians coming to grips with playing the pipe organ. It can be downloaded as a free PDF if you visit Andrea Leal’s article dated 15 August 2022: Manuals Only: Organ Interludes Based on Plainsong. Specifically, it is page 84 in that collection—generously offered as a free PDF download. Johann Pachelbel (d. 1706) was a renowned German organist, violinist, teacher, and composer of over 500 works. A friend of Bach’s family, he taught Johann Christoph Bach (Sebastian Bach’s eldest brother) and lived in his house. Those who read Pachelbel’s biography will notice his connection to two German cities adopted as famous hymn tune names: EISENACH and ERFURT.
    —Jeff Ostrowski
    PDF Download • “Anima Christi”
    I received a request for an organ accompaniment I created way back in 2007 for the “Anima Christi” Gregorian Chant. You can download this PDF file which has the score in plainsong followed by a keyboard accompaniment. Many melodies have been paired with “Anima Christi” over the centuries, but this is—perhaps—the most common one.
    —Jeff Ostrowski

Random Quote

It’s good that you are in the USA, otherwise who is going to—in the best sense—make music?

— Ignaz Friedman writing to Josef Hofmann (4 January 1940)

Recent Posts

  • “Reminder” — Month of May (2026)
  • “Englished” Gregorian Chant • 5 Considerations
  • Simplified Version • “Canon in D” (Pachelbel)
  • PDF Download • “Organ Accompaniment”
  • “Gregorian Chant Quiz” • 4 May 2026

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