Gregorian chants are organized into eight musical modes. Typical melodic features include characteristic incipits and cadences, the use of reciting tones around which the other notes of the melody revolve, and a vocabulary of musical motifs woven together through a process called centonization to create families of related chants. Instead of octave scales, six-note patterns called hexachords underlie the modes. These patterns use elements of the modern diatonic scale as well as what would now be called B-flat. Gregorian melodies are transcribed using neumes, an early form of musical notation from which the modern five-line staff developed during the sixteenth century.Development of notation styles is discussed in some detail at Dolmetsch online, accessed 4 July 2006 Gregorian chant also played a fundamental role in the development of polyphony.
Gregorian chant was traditionally sung by choirs of men and boys in churches, or by women and men of religious orders in their chapels. It is the music of the Roman Rite, performed in the Mass and the monastic Office. Gregorian chant supplanted or marginalized the other indigenous plainchant traditions of the Christian West to become the official music of the Catholic liturgy. Although Gregorian chant is no longer obligatory, the Catholic Church still officially considers it the music most suitable for worship.The Constitution on the Sacred Liturgy, Second Vatican Council. The Catholic Encyclopedia online also addresses this point at length: plainchant article. This view is held at the highest levels, including Pope Benedict XVI: Catholic World News 28 June 2006 both accessed 5 July 2006 During the twentieth century, Gregorian chant underwent a musicological and popular resurgence.
The New Testament mentions singing hymns, and other ancient witnesses such as Pope Clement I, Tertullian, St. Athanasius, and the abbess Egeria confirm the practice,Willi Apel, Gregorian Chant p. 74. although in poetic or obscure ways that shed little light on how music sounded at this time.David Hiley, Western Plainchant pp. 484-7 and James McKinnon, Antiquity and the Middle Ages p. 72. One rare song from this period, the third-century Greek "Oxyrhynchus hymn," has survived, but its connection, if any, with the plainchant tradition is uncertain.McKinnon, James W.: "Christian Church, music of the early", Grove Music Online ed. L. Macy (Accessed 11 July 2006), (subscription access)
Musical elements of what would become the Roman Rite began to appear in the third century. The Apostolic Tradition, attributed to the theologian Hippolytus, attests the singing of Hallel psalms with Alleluia as the refrain in early Christian agape meals.Hiley, Western Plainchant p. 486. Chants of the Office, sung during the canonical hours, have their roots in the early fourth century, when desert monks following St. Anthony introduced the practice of continuous psalmody, singing the complete cycle of 150 psalms each week. Around 375, antiphonal psalmody became popular in the Christian East; in 386, St. Ambrose introduced this practice to the West.
Scholars are still debating how Gregorian chant developed from the fifth through the ninth centuries, as information from this period is scarce. A year-round repertory of plainchant may well have existed when the western Roman Empire collapsed in the fifth century, evolving into different forms in different regions. Around 410, St. Augustine described the responsorial singing of a Gradual psalm at Mass. Around 678, Roman chant was taught at York.James McKinnon, Antiquity and the Middle Ages p. 320.
Other plainchant repertories existed prior to and alongside Gregorian chant in the Christian West. Charlemagne continued his father's policy of favoring the Roman Rite over the local Gallican traditions. By the ninth century the Gallican rite and chant had effectively been eliminated, although not without local resistance.Apel, Gregorian Chant p. 80. The Gregorian chant of the Sarum Rite displaced Celtic chant. Gregorian coexisted with Beneventan chant for over a century before Beneventan chant was abolished by papal decree. Mozarabic chant survived the influx of the Visigoths and Moors, but not the Roman-backed prelates newly installed in Spain during the Reconquista. Restricted to a handful of dedicated chapels, modern Mozarabic chant is highly Gregorianized and bears no musical resemblance to its original form. Ambrosian chant alone survived to the present day, preserved in Milan due to the musical reputation and ecclesiastical authority of St. Ambrose.
Gregorian chant eventually replaced the local chant traditions of Rome itself. In the tenth century, virtually no musical manuscripts were being notated in Italy. Instead, Roman Popes imported chant from the German Holy Roman Emperors during the tenth and eleventh centuries. For example, the Credo was added to the Roman rite at the behest of the German emperor Henry II in 1014.Richard Hoppin, Medieval Music p. 47. Reinforced by the legend of Pope Gregory, Gregorian chant was taken to be the authentic, original chant of Rome, a misconception that continues to this day. By the twelfth and thirteenth centuries, Gregorian chant had supplanted or marginalized all the other Western plainchant traditions.
Later sources of these other chant traditions show an increasing Gregorian influence, such as occasional efforts to categorize their chants into the Gregorian system of modes. Similarly, elements of these lost plainchant traditions were incorporated into the Gregorian repertory, which can be identified by careful stylistic and historical analysis. For example, the Improperia of Good Friday are believed to be a remnant of the Gallican repertory.Carl Parrish, "A Treasury of Early Music" pp. 8-9
Gregorian chant has undergone a series of redactions, usually in the name of restoring the allegedly corrupted chant to a hypothetical "original" state. Early Gregorian chant was revised to conform to the theoretical structure of the modes. In 1562–63, the Council of Trent banned most sequences. Guidette's Directorium chori, published in 1582, and the Editio medicaea, published in 1614, drastically revised what they perceived to be corrupt and flawed "barbarism" by making the chants conform to contemporary aesthetic standards.Apel, Gregorian Chant pp. 288-289. In 1811, the French musicologist Choron, as part of a conservative backlash following the liberal Catholic orders' inefficacy during the French Revolution, called for returning to the "purer" Gregorian chant of Rome over French corruptions.Hiley, Western Plainchant p. 622.
In the late nineteenth century, early liturgical and musical manuscripts were unearthed and edited. In 1871, the Medicean edition of Gregorian chant was reprinted, which Pope Pius IX declared the only official version. In 1889, the monks of Solesmes released a competing edition, the Paléographie musicale, which sought to present the original medieval melodies. This reconstructed chant was academically praised, but rejected by Rome until 1903, when Pope Leo XIII died. The new Pope, Pius X, promptly accepted the Solesmes chant—now compiled as the Liber usualis—as authoritative. In 1904, the Vatican edition of the Solesmes chant was commissioned. Serious academic debates arose, primarily owing to stylistic liberties taken by the Solesmes editors to impose their controversial interpretation of rhythm. The Solesmes editions insert phrasing marks and note-lengthening episema and "mora" marks not found in the original sources. Conversely, they omit significative letters found in the original sources, which give instructions for rhythm and articulation such as speeding up or slowing down. This editorializing has placed the historical authenticity of the Solesmes chants in doubt.Hiley, Western Plainchant p. 624-7.
In his motu proprio Tra le sollicitudine, Pius X had mandated the use of Gregorian chant, encouraging the faithful to sing the Ordinary of the Mass, although he reserved the singing of the Propers for males. While this custom is maintained in traditionalist Catholic communities, the Catholic Church no longer persists with this ban. Vatican II officially allowed worshipers to substitute other music, particularly modern music in the vernacular, in place of Gregorian chant, although it did reaffirm that Gregorian chant was still the official music of the Catholic Church, and the music most suitable for worship.The Constitution on the Sacred Liturgy, Second Vatican Council
Psalmodic chants, which intone psalms, include both recitatives and free melodies. Psalmodic chants include direct psalmody , antiphonal chants, and responsorial chants.Hoppin, Medieval Music p. 81. In direct psalmody, psalm verses are sung without refrains to simple, formulaic tones. Most psalmodic chants are antiphonal and responsorial, sung to free melodies of varying complexity.
The antiphonal chants such as the Introit, Offertory, and Communion originally referred to chants in which two choirs sang in alternation, one choir singing verses of a psalm, the other singing a refrain called an antiphon. Over time, the verses were reduced in number, usually to just one psalm verse and the Doxology, or even omitted entirely. Antiphonal chants reflect their ancient origins as elaborate recitatives through the reciting tones in their melodies. Ordinary chants, such as the Kyrie and Gloria, are not considered antiphonal chants, although they are often performed in antiphonal style.
The responsorial chants such as the Gradual, Tract, Alleluia, and the Office Responsories originally consisted of a refrain called a respond sung by a choir, alternating with Psalm verses sung by a soloist. Responsorial chants are often composed of an amalgamation of various stock musical phrases, pieced together in a practice called centonization. Although the Tracts lost their responds, they are strongly centonized.
Gregorian chant evolved to fulfill various functions in the Roman Catholic liturgy. Broadly speaking, the liturgical recitatives are used for texts intoned by deacons or priests. Antiphonal chants accompany liturgical actions: the entrance of the officiant, the collecting of offerings, and the distribution of sanctified bread and wine. Responsorial chants expand on readings and lessons.Hoppin, Medieval Music p. 123.
The non-psalmodic chants, including the Ordinary of the Mass, Sequences, and Hymns, were originally intended for congregational singing.Hoppin, Medieval Music p. 131. Their musical style is largely defined by the structure of their texts. In Sequences, the same melodic phrase is repeated in each couplet. The strophic texts of Hymns use the same syllabic melody for each stanza.
Gregorian chants are also categorized into three melodic types based on the number of pitches sung to each syllable. Syllabic chants have primarily one note per syllable. In neumatic chants, two or three notes per syllable predominate, while melismatic chants have syllables that are sung to a long series of notes, ranging from five or six notes per syllable to over sixty in the more prolix melismas.Hoppin, Medieval Music pp. 85-8.
Early plainchant, like much of Western music, is believed to have been distinguished by the use of the diatonic scale, possibly as a development from an earlier pentatonic scale. Around the year 1025, Guido d'Arezzo revolutionized Western music with the development of the gamut, in which pitches in the singing range were organized into overlapping hexachords. Hexachords could be built on C (the natural hexachord, C-D-E^F-G-A), F (the soft hexachord, using a B-flat, F-G-A^Bb-C-D), or G (the hard hexachord, using a B-natural, G-A-B^C-D-E). The B-flat was an integral part of the system of hexachords rather than an accidental. The use of notes outside of this collection was described as musica ficta.
Gregorian chant was categorized into eight modes, influenced by the eightfold division of Byzantine chants called the oktoechos.Wilson, Music of the Middle Ages p. 11. Each mode is distinguished by its final, dominant, and ambitus. The final is the ending note, which is usually an important note in the overall structure of the melody. The dominant is a secondary pitch that usually serves as a reciting tone in the melody. Ambitus refers to the range of pitches used in the melody. Melodies whose final is in the middle of the ambitus, or which have only a limited ambitus, are categorized as plagal, while melodies whose final is in the lower end of the ambitus and have a range of over five or six notes are categorized as authentic. Although corresponsing plagal and authentic modes have the same final, they have different dominants.Hoppin, Medieval Music pp. 64-5. The names, rarely used in medieval times, derive from a misunderstanding of the Ancient Greek modes; the prefix "Hypo-" indicates corresponding plagal modes.
Although the modes with melodies ending on A, B, and C are sometimes referred to as Aeolian, Locrian, and Ionian, these are not considered distinct modes, and are treated as transpositions of whichever mode uses the same set of hexachords. The actual pitch of the Gregorian chant is not fixed, so the piece can be sung in whichever range is most comfortable.
Certain classes of Gregorian chant have a separate musical formula for each mode, allowing one section of the chant to transition smoothly into the next section, such as the psalm tones between antiphons and psalm verses.Hoppin, Medieval Music p. 82.
Not every Gregorian chant fits neatly into Guido's hexachords or into the system of eight modes. For example, there are chants—especially from German sources—whose neumes suggest a warbling of pitches between the notes E and F, outside the hexachord system.Wilson, Music of the Middle Ages p. 22. Early Gregorian chant, like Ambrosian and Old Roman chant, whose melodies are most closely related to Gregorian, did not use the modal system.Apel, Gregorian Chant p. 166-78, and Hiley, Western Plainchant p. 454. As the modal system gained acceptance, Gregorian chants were edited to conform to the modes, especially during twelfth-century Cistercian reforms. Finals were altered, melodic ranges reduced, melismas trimmed, B-flats eliminated, and repeated words removed.Hiley, Western Plainchant pp. 608-10. Despite these attempts to impose modal consistency, some chants—notably Communions—defy simple modal assignment. For example, in four medieval manuscripts, the Communion "Circuibo" was transcribed using a different mode in each.Apel, Gregorian Chant pp. 171-2.
Chants sometimes fall into melodically related groups. The specific musical phrases that are centonized to create Graduals and Tracts follow a musical "grammar" of sorts; certain phrases are only used at the beginnings of chants, or only at the end, or only in certain combinations, creating musical families of chants such as the Iustus ut palma family of Graduals.Apel, Gregorian Chant pp. 344-63. A group of Introits in mode 3, including Loquetur Dominus above, exhibits melodic similarities. For example, mode 3 chants have C as a dominant, so it is not unexpected for C to be a reciting tone in mode 3 chants; these mode 3 Introits, however, use both G and C as reciting tones.Hiley, Western Plainchant pp. 110-113.
The earliest notated sources of Gregorian chant used symbols called neumes to indicate changes in pitch and duration within each syllable, but not the specific pitches of individual notes, nor the relative starting pitches of each neume. Scholars postulate that this practice may have been derived from cheironomic hand-gestures, the ekphonetic notation of Byzantine chant, punctuation marks, or diacritical accents.Levy, Kenneth: "Plainchant", Grove Music Online, ed. L. Macy (Accessed 20 January 2006), (subscription access) Later innovations included the use of heightened or diastemic neumes showing the relative pitches between neumes, and a musical staff marking one line with a particular pitch, usually C or F. Additional symbols developed, such as the custos, placed at the end of a system to show the next pitch, and other symbols indicating changes in articulation, duration, or tempo, such as a letter "t" to indicate a tenuto. Another form of early notation used a system of letters corresponding to different pitches, much as Shaker music is notated.
By the thirteenth century, the neumes of Gregorian chant were usually written in square notation on a four-line staff with a clef, as in the Graduale Aboense pictured above. In square notation, small groups of ascending notes on a syllable are shown as stacked squares, read from bottom to top, while descending notes are written with diamonds read from left to right. When a syllable has a large number of notes, a series of smaller such groups of neumes are written in succession, read from left to right. The oriscus, quilisma, and liquescent neumes indicate special vocal treatments, whose exact nature is unconfirmed. B-flat is indicated by a "soft b" placed to the left of the entire neume in which the note occurs, as shown in the "Kyrie" to the right. When necessary, a "hard b" with a descender indicates B-natural. This system of square notation is standard in modern chantbooks.
Chant was normally sung in unison. Later innovations included tropes, extra words or notes added to a chant, and organum, improvisational harmonies focusing on octaves, fifths, fourths, and, later, thirds. Neither tropes nor organum, however, belong to the chant repertory proper. The main exception to this is the Sequence, whose origins lay in troping the extended jubilus of Alleluia chants, but the Sequences, like the tropes, were later officially suppressed. The Council of Trent struck Sequences from the Gregorian corpus, except those for Easter, Pentecost, Corpus Christi and All Souls' Day.
We do not know much about the particular vocal stylings or performance practices used for Gregorian chant in the Middle Ages. On occasion, the clergy was urged to have their singers perform with more restraint and piety, suggesting that virtuosic performances occurred, contrary to the modern stereotype of Gregorian chant as slow-moving mood music. This tension between musicality and piety goes far back; Gregory the Great himself criticized the practice of promoting clerics based on their charming singing rather than their preaching.Hiley, Western Plainchant p. 504. However, Odo of Cluny, a renowned monastic reformer, praised the intellectual and musical virtuosity to be found in chant:
Although true antiphonal performance (alternation between two choruses) is still performed, as in certain German monasteries, antiphonal chants are generally performed in responsorial style, with a solo cantor alternating with a chorus. This practice appears to have begun in the Middle Ages.Apel, Gregorian Chant p. 197. Also during this time, the opening words of responsorial chants began to be sung by a solo cantor, instead of by the full chorus, who finished the end of the opening phrase. This innovation allowed the soloist to fix the performing pitch of the chant for the chorus and to cue the choral entrance.
One school of thought, including Wagner, Jammers, and Lipphardt, advocated imposing rhythmic meters on chants, although they disagreed how that should be done. Pothier and Mocquereau, whose work led to the modern Solesmes editions of Gregorian chant, supported a free rhythm of equal note values, allowing for lengthening and shortening for musical purposes. Mocquereau divided melodies into two- and three-note phrases, each beginning with an ictus, an accented musical pulse akin to a downbeat, notated in chantbooks as a small vertical mark. These basic melodic units were combined into larger phrases through a complex system expressed by cheironomic hand-gestures.Apel, Gregorian Chant p. 127. This approach dominated during the twentieth century, promulgated by Justine Ward's program of music education for children, until Vatican II diminished the liturgical role of chant and new scholarship "essentially discredited" Mocquereau's rhythmic theories.Dyer, Joseph: "Roman Catholic Church Music", Section VI.1, Grove Music Online ed. L. Macy (Accessed 28 June 2006), (subscription access)
Common modern practice favors performing Gregorian chant with no beat or regular metric accent, largely for aesthetic reasons.William P. Mahrt, "Chant," A Performer's Guide to Medieval Music p. 18. The text determines the accent while the melodic contour determines the phrasing. The note lengthenings recommended by the Solesmes school remain influential, though not prescriptive.
The Introit covers the procession of the officiants. Introits are antiphonal chants, typically consisting of an antiphon, a psalm verse, a repeat of the antiphon, an intonation of the Doxology, and a final repeat of the antiphon. Reciting tones often dominate their melodic structures.
The Gradual is a responsorial chant that intones a lesson following the reading of the Epistle. Graduals usually result from centonization; stock musical phrases are assembled like a patchwork to create the full melody of the chant, creating families of musically related melodies.
The Alleluia is known for the jubilus, an extended joyful melisma. It is common for different Alleluia texts to share essentially the same melody. The process of applying an existing melody to a new Alleluia text is called adaptation. Alleluias are not sung during penitential times, such as Lent. Instead, a Tract is chanted, usually with texts from the Psalms. Tracts, like Graduals, are highly centonized.
Sequences are sung poems whose structures are based on couplets, and include such well-known chants as Victimae paschali laudes and Veni Sancte Spiritus. According to Notker Balbulus, an early writer of Sequences, their origins lie in the addition of words to the long melismas of the jubilus of Alleluia chants.Richard Crocker, The Early Medieval Sequence pp. 1-2.
Offertories are sung during the giving of offerings. Originally an antiphonal chant, Offertories once had highly prolix melodies in their verses, but the use of verses in Gregorian Offertories disappeared around the 12th century.
Communions are sung during the distribution of the bread and wine. Communion melodies are often tonally unstable, alternating between B-natural and B-flat. Such Communions often do not fit unambiguously into a single musical mode.
The Kyrie consists of a threefold repetition of "Kyrie eleison" ("Lord, have mercy"), a threefold repetition of "Christe eleison" ("Christ have mercy"), followed by another threefold repetition of "Kyrie eleison." In older chants, "Kyrie eleison imas" ("Lord, have mercy on us") can be found. The Kyrie is distinguished by its use of the Greek language instead of Latin. Because of the textual repetition, various musical repeat structures occur in these chants. The following, Kyrie ad. lib. VI as transmitted in a Cambrai manuscript, uses the form ABA CDC EFE', with shifts in tessitura between sections. The E' section, on the final "Kyrie eleison," itself has an aa'b structure, contributing to the sense of climax.Hiley, Western Plainchant p. 153.
The Gloria recites the Greater Doxology, and the Credo intones the Nicene Creed. Because of the length of these texts, these chants often break into musical subsections corresponding with textual breaks. Because the Credo was the last Ordinary chant to be added to the Mass, there are relatively few Credo melodies in the Gregorian corpus.
The Sanctus and the Agnus Dei, like the Kyrie, also contain repeated texts, which their musical structures often exploit.
Technically, the Ite missa est and the Benedicamus Domino, which conclude the Mass, belong to the Ordinary. They have their own Gregorian melodies, but because they are short and simple, and have rarely been the subject of later musical composition, they are often omitted in discussion.
At the close of the Office, one of four Marian antiphons is sung. These songs, Alma Redemptoris Mater (see top of article), Ave Regina caelorum, Regina caeli laetare, and Salve, Regina, are relatively late chants, dating to the eleventh century, and considerably more complex than most Office antiphons. Apel has described these four songs as "among the most beautiful creations of the late Middle Ages."Willi Apel, Gregorian Chant p. 404.
Gregorian melodies provided musical material, serving as models for tropes and liturgical dramas. Vernacular hymns such as "Christ ist erstanden" and "Nun bitten wir den heiligen Geist" adapted original Gregorian melodies to translated texts. Secular tunes such as the popular Renaissance "In Nomine" were based on Gregorian melodies. Beginning with the improvised harmonizations of Gregorian chant known as organum, Gregorian chants became a driving force in medieval and Renaissance polyphony. Often, a Gregorian chant (sometimes in modified form) would be used as a cantus firmus, so that the consecutive notes of the chant determined the harmonic progression. The Marian antiphons, especially Alma Redemptoris Mater, were frequently arranged by Renaissance composers. The use of chant as a cantus firmus was the predominant practice until the Baroque period, when the stronger harmonic progressions made possible by an independent bass line became standard.
The Catholic Church later allowed polyphonic arrangements to replace the Gregorian chant of the Ordinary of the Mass. This is why the Mass as a compositional form, as set by composers like Palestrina or Mozart, features a Kyrie but not an Introit. The Propers may also be replaced by choral settings on certain solemn occasions. Among the composers who most frequently wrote polyphonic settings of the Propers were William Byrd and Tomás Luis de Victoria. These polyphonic arrangements usually incorporate elements of the original chant.
Gregorian chant as plainchant experienced a popular resurgence during the New Age music and world music movements of the 1980s and 90s. The iconic album was the Chant album, performed by the Benedictine Monks of Santo Domingo de Silos, which was marketed as music to inspire timeless calm and serenity. It became conventional wisdom that listening to Gregorian chant increased the production of beta waves in the brain, reinforcing the popular reputation of Gregorian chant as tranquilizing music.Le Mee, Chant : The Origins, Form, Practice, and Healing Power of Gregorian Chant p. 140.
Gregorian chant has often been parodied for its supposed monotony, both before and after the release of Chant. Famous references include the flagellant monks in Monty Python and the Holy Grail intoning "Pie Jesu Domine" and the karaoke machine of public domain music featuring "The Languid and Bittersweet 'Gregorian Chant No. 5'" in the Mystery Science Theatre 3000 episode Pod People.The Mystery Science Theater 3000 Amazing Colossal Episode Guide p. 39. ISBN 0553377833
Catholic music | Chant | Christian music | Roman Catholic Church art | Song forms | Structure of the Mass | Tridentine Mass
Gregoriánský chorál | Gregorianischer Choral | Gregoria ĉanto | Gregoriano | Gregoriaaninen kirkkolaulu | Chant grégorien | Canto gregoriano | グレゴリオ聖歌 | Cantus Gregorianus | Grigališkasis choralas | Gregoriaanse muziek | Chorał gregoriański | Canto gregoriano | Gregorijanski koral | Gregoriansk sång
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