Plainchant

Plainchant — also called plainsong — is the broad family of monophonic, unaccompanied liturgical chant used in the medieval Western Christian church. Gregorian chant is its largest and best-known branch, but plainchant also encompasses Ambrosian, Mozarabic, Old Roman, Gallican and Beneventan traditions. All these idioms share the basic profile: a single melodic line sung in Latin without measured rhythm, with the music shaped by the verbal accentuation and meaning of the prayer text. Modes (the eight ecclesiastical modes for Gregorian, with parallel systems elsewhere) provide the melodic scaffolding. Plainchant developed as oral tradition for centuries before being notated in neumes from the 9th century onward.

The various Western chant repertoires consolidated between roughly the 6th and 9th centuries as each regional church developed its liturgy. Gregorian chant is traditionally — though now skeptically — attributed to Pope Gregory I (590-604); modern scholarship credits Frankish ecclesiastical reform in the Carolingian period (8th-9th centuries) with codifying and standardizing the repertoire that displaced regional variants across most of Western Europe. The Solesmes Abbey in France led a 19th-20th-century revival of historically informed performance through its restoration of the chant books, work that continues to shape modern chant practice.

Rather than tracking harmonic motion, follow the melodic arch shaped by the words: chants typically rise toward an accented or theologically weighted syllable and fall away into cadence at the end of the phrase. In responsorial chants such as the Salve Regina, the soloist's verse and the choir's response alternate predictably; in melismatic chants like the Alleluia, a single syllable carries dozens of notes. Recordings made in resonant Romanesque or Gothic churches use the natural reverb as part of the texture.

The 'Salve Regina' is the gentlest entry — short, immediately memorable, and one of the four Marian antiphons sung in the Latin Office. The monks of the Abbey of Solesmes have recorded most of the core repertoire; their recordings remain the reference. For dramatic weight, the 'Dies irae' Sequence and the 'Te Deum laudamus' are essentials.

Plainchant and Gregorian chant are often treated as synonyms but should not be: the term plainchant covers the entire monophonic Western chant family, while Gregorian refers specifically to the Frankish-Roman standardization. The boom in chant recordings sparked by the Spanish Benedictines of Silos' 'Chant' (1994), which sold over five million copies, is itself part of the genre's modern history.