Gregorian Chant & Mass – Essential Exam Notes

Music of the Catholic Mass

  • Ordinary (fixed texts): Kyrie, Gloria, Credo, Sanctus/Benedictus, Agnus Dei, Ita missa est

  • Proper (change with day/season): Introit → Collect → Epistle → Gradual → Alleluia/Tract → Sequence → Gospel → Offertory → Preface → Communion → Post-Communion

  • Liturgical year: Alleluia for festive times; Tract for penitential seasons (Lent, Advent)

Church Modes & Solmization

  • 8 modes: Authentic 1-4 (D,E,F,G finals), Plagal 5-8 (a 4th below same finals)

  • Finals & tenors: 1 D/A, 3 E/C, 5 F/C, 7 G/D; 2 D/F, 4 E/A, 6 F/A, 8 G/C

  • Guido d’Arezzo (Micrologus 1025-28): hexachord (ut-la) system; mutation across hexachords; teaching aid, not notation

Chant Classification

  • By text: Biblical (Psalms, Canticles, Gospels, Epistles) vs non-Biblical (Hymns, Sequences, Marian antiphons)

  • By text setting: syllabic | neumatic | melismatic

  • By music: contour mirrors speech; jubilus = Alleluia melisma (joy)

  • By performance: responsorial (solo vs choir), antiphonal (choir vs choir), direct (tutti)

  • By form: strophic, psalm form (Antiphon-Psalm-Doxology-Antiphon), through-composed

Sample Analyses (Mass for Christmas Day)

  • Introit “Puer natus”: Proper; Biblical; neumatic; responsorial; Psalm form; Mode 7

  • Gradual: Proper; Biblical; highly melismatic; responsorial; through-composed; Mode 5

  • Ite missa est: Ordinary; non-Biblical; melismatic; responsorial; strophic; Mode 1

Additions to Liturgy

Tropes (8ᵗʰ–15ᵗʰ c.)

  • Extra text and/or music added to existing chant (esp. Kyrie, Introit)

  • Purpose: clarify Latin for laity, embellish feast days

  • Suppressed at Council of Trent (1545-63) except a few (e.g.
    “Quem quaeritis”)

Liturgical Drama

  • Extended tropes with action & costume; outside Mass; teaching scripture in vernacular

  • Hildegard von Bingen (1098-1175): Ordo Virtutum; wide ranges, Mode 1 preference

Sequence

  • Origin: texted Alleluia jubilus (Nokter Balbulus, St Gall)

  • Form: AABBCC…; syllabic; four retained after Trent (Victimae paschali, Veni sancte spiritus, Lauda Sion, Dies irae; later Stabat Mater)

Early Polyphony

  • Organum: principal chant + organal voice (Musica Enchiriadis 9ᵗʰ c.)

  • Aquitanian (12ᵗʰ c.) florid style; tenor long notes

  • Notre-Dame school (Léonin 2-voice, Pérotin 3-4-voice); rhythmic modes; Magnus Liber Organi

  • Discant vs florid sections alternate within chants

Later Medieval Genres

  • Conductus: newly-composed 2-3-voice processional piece, non-liturgical text

  • Clausula: self-contained discant section replacing earlier organum; led to motet

  • Motet evolution: texted upper voice(s) over chant tenor → Franconian (note-values), Petronian (3 voices, fast triplas), isorhythmic (color + talea; Philippe de Vitry, Roman de Fauvel)

Forms & Performance Quick Keys

  • Syllabic = one note/syllable

  • Neumatic ≈ 2–4 notes/syllable

  • Melismatic = many notes/syllable

  • Responsorial = solo ⇆ choir; Antiphonal = choir ⇆ choir; Direct = unison choir

Music of the Catholic Mass

  • The Mass is the central worship service of the Catholic Church, structured liturgically with specific texts and music.

  • Ordinary (fixed texts): These texts remain constant for every Mass, regardless of the liturgical season or feast day. They include:

    • Kyrie eleison: A prayer for mercy, typically in Greek.

    • Gloria in excelsis Deo: A hymn of praise.

    • Credo: The Nicene Creed, a statement of faith.

    • Sanctus/Benedictus: A hymn of adoration (Holy, Holy, Holy/Blessed is He).

    • Agnus Dei: A prayer for peace and mercy (Lamb of God).

    • Ita missa est: The dismissal, marking the end of the Mass.

  • Proper (change with day/season): These texts vary according to the specific day in the liturgical year (e.g., Advent, Christmas, Lent, Easter, or specific saints' days). They include:

    • Introit → Collect → Epistle → Gradual → Alleluia/Tract → Sequence → Gospel → Offertory → Preface → Communion → Post-Communion

  • Liturgical year: The choice of Proper chants reflects the season's mood. For example, the Alleluia is sung during festive times (e.g., Easter season, Christmas), while the Tract (a long, syllabic chant without a repeating response) replaces the Alleluia during penitential seasons (e.g., Lent, Advent) to reflect a more somber mood.

Church Modes & Solmization

  • 8 Church Modes: These modal scales, rooted in ancient Greek theory but developed in medieval plainsong, define the melodic character of chants.

    • Authentic Modes (1, 3, 5, 7): Their range extends primarily above the final (the tonic of the mode).

    • Plagal Modes (2, 4, 6, 8): Their range typically extends both above and a fourth below the final of their corresponding authentic mode.

  • Finals & Tenors (Reciting Tones): Each mode has a final (the concluding note) and a tenor (a primary reciting tone around which the melody often revolves, used for long passages of text).

    • Mode 1: D (Dorian) / A (tenor)

    • Mode 3: E (Phrygian) / C (tenor)

    • Mode 5: F (Lydian) / C (tenor)

    • Mode 7: G (Mixolydian) / D (tenor)

    • Mode 2: D (Hypodorian) / F (tenor)

    • Mode 4: E (Hypophrygian) / A (tenor)

    • Mode 6: F (Hypolydian) / A (tenor)

    • Mode 8: G (Hypomixolydian) / C (tenor)

  • Guido d’Arezzo (ca. 991/992 – after 1033): A significant music theorist of the Middle Ages, known for his pedagogical innovations.

    • Micrologus (1025-28): His treatise describing practical aspects of chant and polyphony.

    • Hexachord system: Introduced a six-note scale system (ut-re-mi-fa-sol-la), derived from the first syllables of a hymn to St. John the Baptist. There were three types of hexachords: natural (starting on C), hard (starting on G, including B
      atural), and soft (starting on F, including B lat).

    • Mutation across hexachords: To sing melodies that extended beyond the range of a single hexachord, singers would