Plainsong

Plainsong or plainchant (calque from the French plain-chant; Latin: cantus planus) is a body of chants used in the liturgies of the Western Church. When referring to the term plainsong, it is those sacred pieces that are composed in Latin text. Plainsong was the exclusive form of the Western Christian church music until the ninth century, and the introduction of polyphony.

The monophonic chants of plainsong have a non-metric rhythm, which is generally considered freer than the metered rhythms of later Western music. They are also traditionally sung without musical accompaniment, though recent scholarship has unearthed a widespread custom of accompanied chant that transcended religious and geographical borders.

There are three types of chant melodies that plainsongs fall into: syllabic, neumatic, and melismatic. The free flowing melismatic melody form of plainsong is still heard in Middle Eastern music being performed today.

Although the Catholic Church and the Eastern Orthodox churches did not split until long after the origin of plainsong, Byzantine chants are generally not classified as plainsong.