Latest post as it might be useful to someone else who does not get the scale generation in the first place.

First of all you are right! Root note position 0 refers to the Osc tune.
So if I tune my osc to C, my root note positions correspond to:

C C# D D# E F F# G

So it is exactly a semitone step.

The scale is constructed from this and you can easily create all scales and modes considering the intervals between notes.

It might sound obvious but I took a couple of days to elaborate it.
Hope this helps

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