i did exactly the same in RealBand. it's perfectly possible to create a click track to standardize the timing

google Band in a box 2016 for windows new features (its on you tube) and watch the section from about 37 minutes 40 seconds in. this facility has been in RB for the past five years.

then once you have the time, key, chords and everything sorted just add Real Tracks as normal.

it may well be possible in BIAB but i find RB so much easier to use - everything is in front of you - not hidden like BIAB