1. The portions of the Mass sung by the soloist, choir, and congregation changed between the
time of the early Christians and the standardization of the liturgy in the ninth century.
2. The texts for the Mass are the same every week of the year.
3. The most florid chants of the Mass accompanied ritual actions.
4. The Liber usualis contains the complete cycle of chants for the church year as it was sung in
the Middle Ages.
5. When writing chants, composers sought to express the emotional qualities of the text in the music.
6. The musical phrases of a given chant tend to match the phrasing and pronunciation of spoken Latin.
7. Antiphons are sung only during the Office.
8. In responsorial psalmody, such as the Gradual, the soloist sings the psalm verse.
9. The liturgy, music, and manner of performing the Mass remained unchanged from its
standardization in the ninth century until the reforms of the Council of Trent in the sixteenth century.
10. Nowadays when people hear Gregorian chant, it is mostly detached from its original liturgical functions.