This is a very important observation. If you want the upper extension always as you wrote it, Natural Arrangement may be a problem. I think it works by substituting more ‘commonn’ chords that are more likely to produce smoother progressions bar to bar because there are more prerecorded combinations to choose from. If that’s wrong I hope PG Music will tell me.

A corollary of Natural Arrangement is that the visual chords are not changed. I wish there were a way to toggle between what was entered and what it was changed to. I suspect, for example that 9, 7b9 and 7#9 are all changed to 7th chords.


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