Thank you, everyone, for taking the time to investigate this. I didn't realize that not all MIDI standards are equal, and not all Music XML are either. So it must be impossible for any program, not just BIAB, to be completely compatible with every other program in every respect if this is the case.

I also was impressed by the capability of MuseScore in these tests, so I just downloaded it and may be able to use it for certain needs.

My summary:

1- Through various methods it now is possible to get lyrics out of BIAB and into Synthesizer V.
2- It is only slightly possible, and not ideal, to get lyrics out of Synthesizer V and into BIAB because there is a difference between opening a MIDI file, as opposed to importing the MIDI file into an existing BIAB song. The latter is much more important for a proper workflow, and it seems like it should be possible for import to function the same as open. If not, it would be a good idea to remove the "include lyrics" checkbox in MIDI import (since it doesn't work) but keep it in the open MIDI options.

Last edited by ThomasS; 01/06/24 12:58 PM.