HISTORY
A commentary on the History of the Sunday and the Season in general can be found in the excellent Liturgical Year, by Dom Prosper Guéranger. Commentary on the Feast, commentary on the Mass.
PROPERS
Recordings of the music are linked from this site music of the Propers with a commentary and suggestions for choir directors and singers. A more detailed history and commentary on the music for today is explained in The chants of the Vatican Gradual, By Dominic Johner, OSB.
ORDINARY
MUSIC
This site has the chant notation automatically set from code held in Gregobase. This online programme that will also works on phones allows you to choose from comprehensive lists what chants you want to sing and will format it all into a pdf document. You can also click on the neumes and it will play the pitches, and show the range. Here is a link for the options for the Sunday GABC Propers tool.
EXTRA MUSIC
Polyphonic proper Introit: Benedicta sit sancta (Heinrich Isaac)Polyphonic proper Alleluia: Benedictus es, Domine (Heinrich Isaac)Offertory motet: Tres sunt from Duo Seraphim (Tomás Luis de Victoria)Polyphonic proper Communion: Benedicimus Deum caeli (Heinrich Isaac)- Offertory motet: Adesto sancta Trinitas, Vespers Hymn
- Communion motet: Profitentes unitatem, Former sequence for the Feast of the Most Holy Trinity, commentary.
- Prayer for the King: Domine Salvum Fac, from a Jacobite Manuscript c.1740.
MARIAN ANTHEM
Salve Regina, solemn tone