exactly... on a piano you might tend to play the root position upper D most of the time depending on the harmony either side, because it most reflects the melodic line correctly.

In auto backing it is a stretch so you play the inversion because it's much easier and closer together and apc recognises either, and mostly you are highlighting the melodic line in the right hand at the same time anyway, whether in fingered or pianist mode.

Our apc chord finder built into the machines has "typical" positions highlighted for chords for this very reason, as well as the recognised inversions.

it was a good thread, thanks to Chuck's time, effort and inquisitive open mind...