Charlie,
Thank you for detailed reply. There are a lot of tricks to grasp.
RB is a big no-no for me. You know, some folks have phobia of spiders, so me and RB are same way smile

However, I think the "half way solution" that I found is the quickest in BIAB. Just copying whole section with soloist and pasting right beneath it. First will play "off beat" second will play "on beat"...

At least that worked for several soloists (of various instruments) that I tried. That gives me an option to audition soloist without algorithmic road block with whole arrangement, without leaving BIAB and also extract mixer track as WAV, to slice in DAW later.


P.S. A fine "BIAB feature request" topic on Bar-by-bar regeneration / Selected bar freeze, if implemented should solve these algorithm hiccups with ease.