I believe you posted an accurate summary of the main points in this thread so far. The discussion has touched upon many other topics outside the points you've raised.

But, I'd like to point out that it is pretty normal in this forum for a thread to venture way beyond the initial subject of a thread. But the discussion has been worth the effort because the discussion has helped to clearly define the problems and eliminate causes external to the program.
Jim Fogle - 2023 BiaB (1013) RB (Build 6) Ultra+ PAK
Cakewalk - Zoom MRS-8 recorder
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