I rather doubt that the 1940 settings of Te Deum to psalm tones VIII and VII (see nos. 621 & 622) are the same as in the Ravenscroft. I don't have his setting handy, but would venture that he uses the normal plainchant tune as a cf. You could easily determine from examination of the 'tenor' whether he does use the Te Deum melody or something else. Perhaps you would share your observations here.

Thanks for the attachment - I shall study it
As you can see, there are several settings of Te Deum in the 1940, and as you said, the Monk-Croft chants are almost universallly the ones used. However, if you turn to nos. 621 & 622, you will see Te Deum set to psalm tones VIII & VII --- or, are these pages missing in your well-worn book?

Oh, they're there, too. I just don't have them engraved. The Mode VIII, 1 and VII, 3 tones are completely standard Psalm tones, and may be found many places, such as in the Liber Usualis (pp. 116-117 of the 1961 edition). Anglicans have always had a healthy respect for Gregorian chant.

These Mode III chants are also seemingly unrelated to the Ravenscroft Psalter setting.

Ah, I see now.
The Ravenscroft is a verse setting of TD, and the tenor 'playnsong' seems not to be plainsong at all but a metrical tune which I cannot otherwise identify by name. What do you think?

I know this is an old thread, but: All of the Tunes in Ravenscroft's "Whole Booke of Psaumes" are labeled as "TENOR or Playnsong", including such well-known tunes as OLD HUNDREDTH, which is certainly not what we would call plainsong/chant, either Roman, Sarum or Otherwise.

"TENOR or Playnsong", including such well-known tunes as OLD HUNDREDTH, which is certainly not what we would call plainsong/chant, either Roman, Sarum or Otherwise.

That phrase is simply an antiquated way of indicating "Melody in the Tenor" voice. It has nothing to do with "plainsong" as we know it ... except, possibly (or even probably), that the melody in the Tenor is a stand-alone melody that might (could) have been sung by itself, without harmonization.

To confirm and elaborate on Salieri's point just above, it has come to my understanding that in German lands, where alternatim practice continued with congregational hymnody, after the organ's verse the congregation's verse would be sung a capella by the congregation, or, ditto, after an organ chorale prelude.

is this the performance you were referring to? (The Te Deum starts at 48:40.)

I'm amazed at how a youtube item is transferred to a blue word on one of our forum's threads. Just how is this done?

On YouTube's desktop site, go to the page for the video you want to link to. Click the "Share" link, immediately below the red "Subscribe" button.

Below all the social media icons will be a text box containing the link you want. The link is generated automatically by YouTube. It assumes you want playback to start from the beginning.

If you don't want playback to start at the beginning, check the "Start at:" check box. In the text box to the left, type the time at which you want playback to begin in the format mm:ss. Highlight the link & copy it to the clipboard. For the Te Deum, starting at 48:40, the link looks like this:
https://youtu.be/TpCjk2yOSLE?t=48m40s

In the forum "Reply" box, when you have typed the word(s) you want to become the link (in blue), highlight it. Then click the "Link" button, at the top of the reply box, second from right (with the chain icon). You'll get some code with the text you highhighted appearing twice, the first time in quotes. It will look like this:
<a href="Link display text">Link display text</a>

By pasting from the clipboard, replace the quoted text with the link you copied from the YouTube page. Now, it should iook like this:
<a href="https://youtu.be/TpCjk2yOSLE?t=48m40s">Link display text</a>

When you post (or preview) your post, the link will look and function like this:
Link display text

Hope this helps.

Edit: It sounds harder than it really is.

dB