Concerning solemn versus simple psalm tones, I have noticed that 16th century polyphonic Magnificat settings did not use the "Magnificat tones" listed in the Antiphonale Monsaticum/Romanum as cantus firmus, but instead the plain psalm tones.
Are the "solemn tones" a more recent addition?
And how do you resolve this discrepancy when singing a polyphony/chant alternatim Magnificat? Do you sing the chant to the simple tone matching the polyphonic setting or to the "solemn tone"?
I use the solemn tone and the simple tone according to common usage. So I & II class feasts get solemn, anything else simple. But we aren’t singing polyphony on ordinary Sundays, and I think that the solemn tone is just long enough that it’s necessary for us. We only had incensation of one altar and then the usual people in order for Pentecost, and the Magnificat ended with just enough time to pause only briefly before resuming the Gloria Patri. When allowed I would need organ or historical instrument coverage if I were so blessed to fill in the gap. And I would find it a bit too jarring in our current situation to not have Renaissance style playing in the same mode even on a modern organ so…
Also while I can agree that the tones of our editions aren’t always there, in the Lassus Magnificat primi toni that I just mentioned for Pentecost, the solemn tone kind of shows up in the tenor.
What I wouldn’t do is what I found on an otherwise nice CD (featured by Early Music America no less on its playlist of items reviewed that year) with Lassus Magnificats particularly those based on madrigals and chansons: they used the introit tones. :(
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