Temperley, Nicholas (1981). "The Old Way of Singing: Its Origins and Development". Journal of the American Musicological Society. 34 (3): 511–544.
That was the third overhaul in 50 years! The two current Graduals for the Mass suggest generally a repetition of the antiphon after each verse or strophe, but again are flexible.#121 The psalms can be recited in various ways taking into account whether they are said in Latin or in the vernacular, and especially whether they are said by an individual or by a group, or recited in a celebration with the people. ... #122 .. sung or said straight through (in directum) with alternate verses or strophes sung or recited by two choirs or two parts of the congregation, or in responsorial fashion - the ways tested by tradition and experience. #123 An antiphon is said at the beginning of each psalm (cf ## 113-120). ... The antiphon may, if so desired, be repeated after the psalm. ... #125 The literary character may suggest ... repeated after each verse, ...
am I mistaken in thinking that antiphons were ever between every verse in the Office?
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