Jim, thanks for checking, Turns out my defaults were already set for "allow RTs subst based on tempo" and stretching set to "High". BIAB did not suggest any substitution.

I found" #3646 FingerPickin' IndieFolk even16 nylon guitar at 100 bpm". Had to rebuild the RTs for this to appear. But that is another problem. I am afraid that will not work for me. While the "fret noises" are a little more tolerable I am hear little motiffs in the picking which go beyound "accompaniment" and impose small lead lines which impact my melody. I don't want that. I want a predictable rhythm only. I returned to my project in the DAW and found some very nice Kontakt libraries for finger picking guitar accompaniment. I will mark this resolved assuming the initial reported error is due to stretching.

Steve, what you report sounds familar as a problem with the BIAB libraries. The fix is always the same... rebuild the libraries and/or return to factory settings. Or perhaps you simply don't have that style. Thanks anyway for checking.

BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6