Durandus ... says, that the sentences which precede the Psalms and Canticles are called Antiphons "non quia alternatim a diversis choris cantentur ; sed quia sicut claves et indices, ad quorum modulationem ac sonum, sequens canticum psalmusque alternatim cantatur. Tonus enim totius psalmi ex tono antiphonae sumitur" - "not because they are sung by two choirs alternatively, but because they are as keys and indices to the tone and mode, to which the Canticle or Psalm following ought to be chanted antiphonally. For the tone of the whole Psalm is taken from that of the Antiphon."
I do grant that antiphonal singing can, or could theoretically, occur without an antiphon being involved, though I can't think of an incidence of this in liturgy - which isn't to say that there absolutely isn't one.
Nowadays, isn't it established use...
And the next step...
...instructs the antiphon's verses be begun by the cantors...
The reference is specifically to the antiphon of the introit...
...the cantors begin the Introit [Antiphonam ad Introitum]. (...) The Choir continues until the Psalm. The first part of the Verse of the Psalm as far as the asterisk, and the V. Gloria Patri are sung by the cantors, the full choir taking up the rest of the verse. Afterwards, the Introit as far as the Psalm is repeated by the full choir.
When the antiphon has been sung by the choir, a verse is presented by one or more cantors, and then the antiphon is repeated by the choir.
The thing that gets me is the submission of a score without a name on it.
Plus, they want it in a responsorial form with the antiphon set for congregation which can be, well, not my cup of tea.
And thus it happens that the terms, used in the OF Missal for the so-called "Missal Propers", remain "Entrance Antiphon" and "Communion Antiphon". This being the case, they may presumably continue to be called such even when you set them to music and add psalm verses sung by cantors.
The thing that gets me is the submission of a score without a name on it.
Many are illicitly using those texts in the missal which are specifically instructed to be spoken by the celebrant and not used when there is music.
what sense could it be correct to call this use "illicit"?
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