"All The Things You Are" in Ab Major-Play Along/Backing Track

Here is a backing track/play-along for the Jazz standard "All The Things You Are" in Ab Major. I made it using Band in a Box.
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Music; Band In A Box

[@MikeM91320]

If its key of Ab, can we play Bb across all changes? Or should I try other keys on certain sections?

[@JeffLewisTrumpet]

Hi Mike,
I posted a 4 part UA-cam short series on a way to simplify improvising over this tune. You can check out the first one here;
ua-cam.com/users/shorts46ukFXDOUfc?si=Df8_pVEfc5HYAVeL