So, approx 2 yrs later, this feature is still kind of buggy.
Only just updated to BIAB 2021 (using 2008 version for years).
Just made a 4 bar practice track (midi, not realtracks) to learn a certain riff in all keys. BIAB transposes the last 2 beats of the last bar early.
A work-around was to add another bar, as a rest (or with just drums) at the end. That bar is transposed but no chord is sounded.
Then it plays correctly. But it does not render correctly as an audio file, nor even as a midi-file. No transposition in those files.

It should be possible to render in real time from midi with the changes: https://www.pgmusic.com/tutorial_ptwrender.htm.

That said, scripts in "Transcribe" can automatically transpose rendered audio:
https://www.seventhstring.com/xscribe/scripts.html

This works rather well. Open the file, then drag the desired script onto the window. The scripts can be edited in Notepad.

Last edited by BLjazzsax; 04/03/21 01:17 PM.