Gregorian Chant

Gregorian chant is the monophonic, unaccompanied vocal music of the Roman Catholic liturgy, sung in Latin to texts drawn from the psalms, the Mass ordinary and the daily office. There is no fixed tempo: the rhythm follows the natural accents of the spoken Latin, with breath and meaning, not a metronome, controlling pace. Performance is typically by a male choir of 1-30 voices in a monastic setting, though female religious communities maintain parallel traditions. The acoustic of a stone church or abbey — reverb times of 4-8 seconds — is part of the sound, the gaps between phrases ringing on into silence. The notation is neumes, a non-staff system of small marks above the text that indicates contour and grouping rather than precise pitches.

Tradition credits Pope Gregory the Great (around 600 CE) with collecting and standardizing the chant repertoire, but the historical work was actually done two centuries later under the Carolingian emperors, who imposed a unified Roman-Frankish liturgy across their empire. Major early sources include the 9th-century Cantatorium of St. Gall and 10th- to 13th-century manuscripts from Laon, Einsiedeln and Solesmes. The Abbey of Solesmes in France led the modern scholarly restoration starting in 1833 under Dom Prosper Guéranger; the chant editions Solesmes produced between 1903 and 1908 (the Liber Usualis) remain the standard performance source. The 1990s saw an unexpected popular revival when 'Chant,' a Spanish monastery's reissue, sold six million copies worldwide.

Notice how the melody hugs the natural stresses of the Latin text — multi-syllable words rise toward their stressed syllable, and single-syllable words sit flat. On melismatic chants (Alleluias, Graduals) a single vowel may carry 10-30 notes in a long ornamental line; on syllabic chants (most psalm tones) each syllable gets one note. The silences are deliberate: a phrase ends, the room rings, and only when the resonance dies does the next phrase begin. Modes (eight 'church modes,' the ancestors of major and minor) give each chant its distinct color.

For a single piece, almost any Kyrie from Mass XI ('Orbis factor') serves as a clean introduction. For a full album, 'Chant' (1994) by the monks of Santo Domingo de Silos is the most-heard recording; for a scholarly performance, the Schola Hungarica or Ensemble Organum recordings explore early monastic style.

Modern Western staff notation, the do-re-mi solfège system and even the names of the notes themselves were invented by the 11th-century monk Guido of Arezzo specifically to teach Gregorian chant faster. The syllables come from the first lines of a Latin hymn to John the Baptist whose successive phrases each began one note higher than the last.