Originally Posted By: BIABguy
It learns some patterns of his playing, possibly?
But it can't cut up individual notes and use them to build lines?

That's right on target - and relativizes very much the original suggestion. UserTracks consist of riffs, licks and phrases played over some typical progressions and serve as a resource to recreate the typical playing of the pertinent artist, say. They likely won't recreate a specific bass line you once entered.

To have a specific base line playd over some 32 bars, say, you better record this playing with a human player.

Or use midi - albeit you'd hear the difference ...

Martin