I also saw in a French forum a Gregorian scholar saying that Van Biezen's researches answer all the objections that Cardine raised in relation to Vollaerts' mensuralism
Compare the three for each source to get an idea of the inconsistency of the scribes.
Where do the recorded offerings of speculative interpretations by Marcel Perez stand in your estimation?
I have read some criticism of his use of oblique organum/ison/drone, which apparently isn't documented before the 14th century.
Blackley was one of the last to publish on mensuralism.
There may be a kernel of truth in what he and others have proposed, but it would seem that we can never know with any certitude how the very earliest cantors performed their chant ... not to mention something so basic as how they 'felt' their chant, influenced immeasurably how the chant was performed.


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