Not exactly. I don't follow the Benedictine distribution of the Psalter, so I'm not exactly clear on the details, but I do know that the Psalterium Monasticum includes all of the schemas for all of the hours as available in 1981, the time of its publication. I also know that Vol. II of the Antiphonale Monasticum is an update of this (published 2006 or so), but it does not include any of the Psalms or antiphons for Matins.

So if you're deciding on which to purchase, it depends largely on how you're hoping to use it.

Psalterium Monasticum reflects the guidelines set out in Thesaurus Liturgiae Horarum Monasticae, the 1977 successor to Breviarium Monasticum. Rather than revise the monastic breviary, Abbot Primate Rembert Weakland OSB promulgated a directory (or "treasury") of materials for Benedictine communities to design their own modernized Office. Psalter schemes A, B, C, and D are indicated in Psalterium Monasticum. Scheme A is the closest to that described in the Rule of St. Benedict. Scheme B is the most widely used in Benedictinism.

The Thesaurus can be viewed and downloaded on my Scribd site.

Without me doing the research myself, I'm curious, does the layout of the Antiphonale Monasticum Vol. II favor one of these schemes?

Definitely Scheme A (the Rule of St. Benedict scheme, modernized). The psalms of the Little Hours are given in the new Antiphonale as a batch from which they may be arranged according to several options in the Thesaurus. There's the default arrangement in the Schema A table, and there are other options using only two little hours, or only one midday little hour.

For the Latin Ordinary Form there are no chant books yet, at least not for the daily office. The only volumes of the Antiphonale Romanum for the Ordinary Form that have been released so far are the Liber Hymnarius (1983) and the Antiphonale Romanum II (2009). The last one only has the chants for Sunday Vespers.

There is, however, an official list of all the chants needed: the Ordo cantus officii (OCO). The psalterium for weekdays starts at p. [55]. As you can see there, the majority of the antiphons for the daily office are taken from the Psalterium Monasictum (1981) and occasionaly from the Antiphonale Monasticum (1936).

For Compline there is a single chantbook available with the Latin texts and antiphons according to the OCO: Ad Completorium. It differs significantly from another edition, The Office of Compline by Ignastius Press, in that the texts of the antiphons of the latter are taken from Liturgia Horarum instead, resulting in a couple of neo-Gregorian antiphons. (Reason: Liturgia Horarum is intended to be recited, not sung. If the office is to be sung, one really needs the OCO).

In my free time, I'm working on a Liber Antiphonarius according to the OCO, but it's far from completed. If you let me know which offices you would like to pray (Lauds, Vespers, ...), I might adjust my priorities and get, for example, the psalterium ready first.

For other (free) editions for the chanted OF Office in Latin take a look at my website.

And to answer your question about recordings: I don't know of any website that has recordings of all antiphons for the Latin Office, either Ordinary or Extraordinary Form. This might be a wonderful project for someone to undertake! In the mean time, you could check the YouTube page of Giovanni Vianini. He occasionally records office antiphons. Or you could listen to the chanted office at the website of Radio Vaticana. The recordings are only kept for one day.

"For the Latin Ordinary Form there are no chant books yet, at least not for the daily office. The only volumes of the Antiphonale Romanum for the Ordinary Form that have been released so far are the Liber Hymnarius (1983) and the Antiphonale Romanum II (2009). The last one only has the chants for Sunday Vespers."

Actually there's a semi-official antiphonary, "Les Heures Grégoriennes" put out by the Communauté St. Martin, in France for the day hours of the Latin Liturgy of the Hours, entirely noted for chant, and with French alongside. Three volumes (Advent/Christmas/Ordinary Time, Lent/Easter, Sanctoral). Also the Antiphonale Romanum II includes not just Sunday Vespers, but also Vespers for all feasts and solemnities, including First Vespers where applicable.

I highly recommend Les Heures Grégoriennes. It doesn't include the Office of Readings, but the OOR is what the Night Office (Vigils) has become and in many monasteries Vigils is sung recto-tono. LHG has the hymns, the antiphons, the responsories, common tones for both Latin and French, and of course the psalms with the added bonus that the imprecatory verses are there but in brackets. The books are brilliantly arranged for chanting with minimal page flipping and the quality is much better than the more recent offerings from Solesmes. The only downside to the books is that they're rather heavy. I have a prie-dieu in a small oratory I built at home so I rest the book on it when I chant the office but for choristers in a schola they might get tiring after a time.

[OK, I'm going to cut this thread back to just the informational comments. --admin]