Chant sources for the feast of the most Holy Trinity

The invitatory antiphon and feast can be found in the:

• Liber Responsorialis, page 440-1; 
• Nocturnale Romanum (NR), Page 504ff; and
• Liber Hymnarius (page 106 for the invitatory; 206 for hymn, using an alternative chant tone).

Sources for the antiphons are listed below, along with links to sources for the responsory chants: AS= Antiphonale Synopticon.


Nocturn I

1: Adesto unus Deus: NR 505; AS (Ps 8)
2. Te unum in substantia: NR 506; AS (Ps 18)
3. Te semper idem esse: NR 508; AS (Ps 23)
4. Te invocamus: NR 511; AS (Ps 28)
5. Spes nostra: NR 512; AS (Ps 32)
6. Libera nos: NR513; AS (word change) (Ps 45)

R1: Vidi Dominum
R2: Benedictus Dominus
R3: Benedicat nos Deus
R4: Gloria Patri

Nocturn II

1. Caritas Pater: NR 517; AS (Ps 46)
2. Verax is Pater: NR 519; AS (Ps 47)
3. Pater et filius: NR 519 (Ps 71)
4. Gloria et honor Deo: AS (Ps 95)
5. In Patre manet: AS (Ps 96)
6. Sanctus sanctus sanctus: AS (Ps 97)

R5: Quis Deus magnus
R6: Tibi laus
R7: Magnus Dominus
R8: Honor virtus et potestas

Nocturn III

Ant: Laus Deo Patri: AS
Canticle 1: Isaiah 33:2-10
Canticle 2: Is 33:13-18
Canticle 3: Ecc 36:14-19

R9: Benedicamus Patrem
R10: O beata Trinitas
R11: Te Deum Patrem
R12: Duo Seraphim

Feast of St Joachim and Anna (July 26) - chants for Matins

Note that the invitatory antiphon and hymn provided for the feast in the Liber Responsorialis are not those used for the 1962 version of the feast.

Instead:

• the invitatory antiphon (Christum regem) can be found in the Liber Hymnarius, pg 585;
• the hymn, Gaude Mater, is in the Antiphonale Monasticum, pg 985;

I haven't been able to locate a chant source for the responsory, O clara stirps however (please let me know if you know of one!).