Originally Posted by ThomasS
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So if you are using Realtracks, it is essential to have this substitution in many cases. I don't know why it didn't work for you in this particular case, but to see if it can work don't regenerate the whole chart, but use multiriff regenerate (F8) on just the offending track and see if at any time it can play Mmaj7 or not. That way you can quickly keep hitting regenerate for just that chord for that insturment to see what are the possibilities.

Yes I was already trying F8, more specifically Ctrl-F8 to zero in on the offending bars.
But it didn't help.

Quote
I suggest trying this 8-bar sequence on various Realtrack styles, and compare the second bar to the sixth bar to see which is better.

Cm | Eb+/C | Cm7 | F7 |
Cm | CmMaj7 | Cm7 | F7 |

I tried your chords with the following styles:

_JAZOR60 worked
_WEFT worked
_SJAZZBL worked
_JBLADEP worked
_SAVVY worked

Both the +/C and the mMaj7 worked.

Then I went back to my song. I swapped my style for _SJAZZBL (which had worked above).
It worked at first, but was giving a warped sound, just like my original organ sound (_JAZOR60).
So to fix the warped sound, I disabled sour notes for the keyboard track.
And of course I lost the mMaj7 chords. frown

So something really weird is going on with BIAB.
Specifically related to mMaj7 chords and 'disabling sour notes'.
The two just don't like each other (for me).

A BIAB user for more than 30 years (if you can believe it) !