@giantpiazza31,
Quote:additionally, do you know the same information about Viderunt omnes
The link to
Viderunt omnes you posted is an organum. If you look up the musical features of organums, that should give you most of the information you're looking for.
Quote:and Nuper Rosarum Flores
Do you read music? If so, the question of whether
Nuper rosarum flores is metered, and what texture it is, can be answered by looking at the images featured in the YouTube video you posted.
Even if you can't read music, I bet you can use your ears to answer some of these questions. In the Dufay piece, do you hear more than one note being sung at a time? If so, that will help you determine the texture, or at least help you rule out some of the options.