That first interval labelled "1" was supposed to be "8", octave higher.
Two staffs is an option, but as far as I know, the script would work with as many staffs as the writer is using. I haven't tested that, it is an assumption.
The Cantus note may be a different duration, but the duration is chosen firstly in the Cantus position.
"Without thinking" is kind of important, because there can be the ability to write, without spending too much time processing exactly what those intervals look like in the beginning phases of learning/experimenting with different combinations. So the composer may write a few longer phrases and get encouraged to put more effort into learning what combinations produce what outcomes. In the beginning of counterpoint learning, there is just the use of consonant intervals (unison/octave, min/maj third, per fourth, per fifth, min/maj sixth).
The first steps here are working with limitations, then as the learner is progressing through different species, more intervals such as dissonant ones are used, and the note duration is not necessarily equal on top and bottom, with even the possibility of over-lapping (but I'm not sure the script needs to address over-lapping, i.e. a whole note on bottom and a half rest then whole note on top, then alternating -by two beats- all whole notes top and bottom, if you can get the gist of how that could be called 'over-lapping').
Yes, exactly. One bug I'm running into with the version I wrote, is that if I have a whole note on bottom (for instance) and create the first half note on the staff above, then I go to create the next note, because the note is a copy of the whole note, the second note gets pasted as a whole note too, which makes me have to use "split measure" and in some cases "join measure", which is rather easy to do, but some would label it a bug, however it can at least be easily worked around with split-measure command (although I'm pretty confident that you could come up with something that would fix that if it was seen as problematic from your point of view).
You appear to have a solid grasp/understanding of what is trying to be achieved here now.
I couldn't thank you enough!
I'm going to take a look at it. I did notice it the other day and it seemed intriguing. Although I trust you will come up with something sufficient, I will continue to pursue trying things out to compare and maybe make some suggestion if I notice something that works differently for me.
Hmm... I started with all the intervals from the 'Add Note Above Base Of Chord' part of the Chords object menu listings.
Very happy about it.