Today is the the Feast of the Annunciation. A bit about today’s holy day from ChurchYear.Net.
All About the Solemnity of the Annunciation
Some of the chants for today’s Mass are the same as those for the 4th Sunday of Advent. Among them, the Introit, or entrance chant, Rorate Caeli:
The antiphon and psalm verse are taken from Isaiah 45:8 and Psalm 18 (Vulgate numbering):
“Skies, let the Just One come forth like the dew, let him descend
from the clouds like the rain. The earth will open up and give
birth to our Saviour. V. The heavens declare the glory of God, and
the firmament proclaims the work of his hands.”
The Communion, or communion chant, Ecce Virgo:
The antiphon is also from the Book of Isaiah, Chapter 7, Verse 14:
“Behold, a Virgin shall conceive and bear a son, and his name
shall be called Emmanuel.”
This recording also adds the corresponding verse from Psalm 18 (“The heavens declare the glory of God, and the firmament proclaims the work of his hand”, same as in the introit).
Also in honor of tdoay, from the Rosary Sonatas by Heinrich Ignaz Biber:
Rosary Sonata #1, The Annunciation