from The Century Dictionary and Cyclopedia
- n. In old church music, all that part of the service sung by the whole choir, as hymns, psalms, halleluiahs, etc., in contradistinction to accentus, the part sung or recited by the priest and his assistants at the altar.
- n. Harmony; consonance in partmusic for different instruments.
Sorry, no etymologies found.
Canicularis terras excoquit, et siccat flumina, ipse securus sedet sub arborea fronde, et ad doloris sui solatium, naribus suis gramineas redolet species, pascit oculos herbarum amiena viriditas, aures suavi modulamine demulcet pictarum concentus avium, &c.
Thus hymns, psalms, and alleluias were, generally speaking, included under the term concentus.
In the ancient Church music all that portion of the liturgical song which was performed by the entire choir, or by sections of it, say two or three singers, was called concentus.
The accentus should never be accompanied by harmonies, whether of voices or of instruments, although the concentus may receive an accompaniment.
Divexerunt clerici cum laicis, metu stelerunt omnium capilli, et psalmorum concentus defecit.
Sirenarum concentus credas esse, non hominum, et de vocum facilitate miraberis quibus philomena vel psitaccus, aut si quid sonorius est, modos suos nequeunt coæquare. "
The omitted chants (styled concentus), which are to be sung by the choir, are contained in a supplementary volume called the "Graduale" or "Liber