With due respect, this is only partially correct. An erroneous interpretation persists that when the vertical episema appears over the podatus of the salicus, the marked note is lengthened only if the interval is a fifth. I recently discussed this point in another thread. Please refer to the English introduction to the Liber, section IV.6 of the Rules for Interpretation. The neume at the beginning of the "Gaudeamus" introits and elsewhere is not a true salicus, but rather a scandicus with a neumatic break. Carroll describes it as a neume similar to the salicus, and gives examples with a podatus of a fourth as well (pp. 65-9 of his Applied Course). Do you have a page reference that addresses my specific question? I would truly appreciate it. I have read the book cover to cover but don't recall a discussion of it.In the Solesmes rhythmic editions, the salicus is indicated by a vertical episema under the *podatus* except where there is an interval of a fifth.
(Not Carroll as I mistakenly indicated above.)We treat as a salicus [1] every ascending group of 3 or more notes of which the penultimate ascending note is marked underneath by the vertical episema.
If the vertical episema, in an ascending group, is printed above the note, we do not treat the group as a salicus [2] except in the case of an interval of a fifth.
[1] We say "treat as a salicus": we know that sometimes in the MSS it is not, in fact, a salicus; but having to deal with an imperfect edition, we are obliged to adopt a practical rule which corresponds to the majority of the cases.
[2] As a matter of fact it sometimes is a salicus in the MSS. We have adopted here the treatment which more often corresponds to the MSS.
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