I have a question on the psalm tones Fr. Weber uses in his Propers. If you look at his Glory Be verses at the back, he has both the simple and the solemn tone. I know the solemn tones are from the traditional Latin Propers. What is the origin of the simple tones? Do they also come from the Latin Propers, the Divine Office, some other source, or did he write them himself?
They are the Psalm Tones of the Divine Office. The second "simple tone" for Mode 2 is the tone for Compline of the Octave of Easter, when the psalmody is recited "In Directum" without an Antiphon.
It is a tone that wanders: it has two reciting pitches (tenors), unlike the other tones which recite on the "dominant" of the modes that they are connected with: Modes I, V, VII on the fifth degree; II, (IV), VI on the third, III on the sixth, IV, VIII on the fourth (it's really a little more complicated than this, but this is the gist): the psalm tone is chosen to match the mode of the Antiphon with which it is used. There are some Antiphons which do not fit within the eight Modes of the "octoechos", and with which the various Irregular Tones are assigned: most of the Irregular Tones have a constant tenor like the other tones: the Tonus Peregrinus is unique because the tenor changes, thus it is a "wandering tone", and the Antiphons that use this tone also wander through the modes: cf. Sunday Vespers (Old rite), antiphon for Psalm 113 (In exitu Israel).
As a quick aside, here’s a little plug for my ‘Alleluia Peregrinus” which is a great alleluia for advent and for funerals, in particular. https://youtu.be/H9xmEdped40
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