Quote:
unless the "training" template contains the many variations that you'd find in, e.g. the Jazz Real Books. Without a 9th, maj9th, flatted 9th, etc, one can't really create a useful jazz user track.


This IS a User area where Users create and share.
If you are a Jazz guy then it's not rocket science, all you jazz guys should be able to input on this,
I could make some up but I'm no guitar George when it comes to jazz chords, but I would think it's just a matter of putting the progression you need using all the chords you need in the usertrack, then create it in a lot of different keys, like the 12 key realtracks.
Biab will choose the different sections/chords of the usertracks, if the usertrack has so many bars of the same progression, it will copy and paste that section else it will create it up from a chord here and a chord there and piece them together to create the instrument track for your song the same way realtracks work.

The more you put into a usertrack the more you will get out of it, so add lots of different endings as well, don't limit yourself you have 255 bars per track limit.

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