Can anyone tell me what the triangular noteheads mean? This is a solemn tone "Alma Redemptoris Mater" and these are the only two in the piece. I don't know the exact origin of this particular setting, but I was told it came from France.
You are probably right about the liquescence. My first thought was that this looked suspiciously like a deformed cephalicus. What is the date of this odd example?
After comparing to square notation of the Solemn Tone, I'm pretty sure the triangle noteheads are equivalent to quilismas (probably not available in the software used to engrave the music). I also suspect that the small round note at the end of the first line is a liquescent. I wish I had more to go on, however.
MJO, I'm afriad I don't know the date. It was sent to a friend of a friend as an email attachment (supposedly from a monastery in France), and a printed copy found its way to me.
CHGiffen, here's a scan. I have the other Marian antiphons, too, some with the strange triangles.
I notice in the Canto Ambrosiano copy, a question mark before the notes for nu in genuisti, is this a recognized symbol for "oops this should be a tone above but I didn't leave enough space in the typesetting"? It is a tone higher (the only high E in the tune) in the EMH copy. I can't play the recording to check what they think, possibly because for copyright and DRM purposes my computer thinks its in the UK.
This chant appears to be from the Canto Ambrosiano website, It is common on that site for such figures to appear. I think it is their way of saying that manuscripts differ over those neumes.
In the recording, the (question marked) podatus on the syllable "-nu" in genuisti is sung on fa-sol (rather than the question marked mi-fa), in accord with the scan provided by EMH. FWIW, I think that is the "correct" interpretation.
While the Solemn tone of this Marian Anthem should be well known... there are a number of differences between different usages, I have just taken the 'nu' as an example
Here is the Monastic Tone, from the Antiphonale Monasticum pg. 173,
Here is the Ambrosian tone, from the Liber Vesperalis Ambrosiano pg. 807,
Here is the Roman from the L.U. pg. 273,
N.B. For further comparisons the A.M. is available from CC Watershed, The L.V.A. can be found using google, and the L.U. is one of the books available from the CMAA.
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