White Sunday: Ordo notes (and singingTe decet laus in Eastertide)

White Sunday (and Pentecost Sunday likewise) is somewhat unusual as the Octave day of a feast, in that it is not a simple repetition of the texts of the feast.  Instead, the Office is largely that of the Ordinary of Eastertide, but reusing many (but not all ) of the responsories from Easter Sunday.

Divinum Officium

Matins as set out at Divinum Officium (pre-Tridentine monastic) generally conforms to the 1963 monastic office save for the readings and responsories, which can be found arranged correctly at my Lectio Divina blog.  The final Our Father should also be omitted.

Finding the chants

There is only one antiphon for each Nocturn, and these are used on Sundays throughout the season.  The texts are in the Clear Creek Matins booklet (Matins according to...); the chants can be found either in the Psalter for Matins of Peter Standhofe (PDF only), or the Nocturnale Romanum.

In terms of the other chants:

• the invitatory antiphon is Surrexit Dominus vere, alleluia, which can be found in the Liber Responsorialis (LR), pg 82; Liber Hymnarius, pg 79; or Invitatory booklet;
• the hymn is Rex Sempiterne Domino, LR 82, Nocturnale Romanum or Liber Hymnarius;
• the responsories can mostly be found in the Liber Responsorialis under Dominica Resurrectionis (pg 82 ff), but note that there are some differences in order from Easter Sunday, and the second responsory for White Sunday, Angelus Domini locutus est, is not in LR, but can be found at Gregorfacsimil or in the Nocturnale Romanum, pg 442.

Note that the Easter tone for the Te Decet Laus is used, and this can be found both in the LR (Pg 42, alter tonus) and Liber Hymnarius.  The version in the Hymnarius (tone no 1 in the page above), used in the recording below, has some differences to the LR version, but they are very minor.