...and feel like sharing?

I have been working on a generic, randomizing sequencer ("genplayer~") that thus far includes everything I can think of.

However, I know next to nothing about harmony.

But it seems to me, given the diagram below, one could start at key (triangular point) X and tell the program to weighted-randomly pick between ex +/-1 clockwise/counterclockwise points, +/-2 CW/CCW, etc.

As I say, I know nothing about harmony (except what I learned making the metamodal bridge with my friend).

Yet, I am pretty sure, if one took what it does (filtering input to only notes that are in the mode-key) and what you know about harmony...we could make a patch that sends random notes, but changes whether they are in, for example Keys C,G,D (where C and D are +/-5 points away from G).

In advance I appreciate your help...and having read this far.

Peace through sharing.
And Love through Music.

p.s. in it's current incarnation, genplayer~ leaves the changing of keys up to the user. But it would be way cooler, if it could just do it on its own [metro] time.

p.p.s. I am thinking it would do something like the metamodal bridge with harmonicity: choosing (via a setting) whether to even allow (given any weight to) those key combinations which are most harmonious to those which are least harmonious.

Happy PDing.

@svanya It depends on if your sequencer is polyphonic or not, key changes are considerably more complex when dealing with chords, those notes lacking sharps/flats (E, F, B and C) kind of muck of the works and make things difficult and it gets even more difficult when you start adding in things other than the a single scale and once you work out adding in other scales you want to make room for substitutions, sort of a bottomless pit. If you are dealing with monophonic (technically melody and not harmony) than things are fairly easy, a major scale is just three whole steps then a half step, two whole steps then a half, so the math is simple and straight forward, you just need to make sure things follow the whole, whole, whole, half, whole, whole, half pattern or what ever pattern is required for the chosen scale. No idea if this is helpful, knowing some more details about your sequencer will help provide a more concise answer.

As a side note, it is fairly simple to get the minor scales as well since we can exploit the relative minor of any give key to keep the math simple. Every major scale has a relative minor, this is the same as the sixth (Aeolian) mode, the notes are the same but the distribution of the intervals changes, makes it simple to get both at once. This trick is only useful if you are limiting yourself to just the major and the minor.