Also, there is an option when creating the MIDI to "write the harmony to the Melody track". If that is chosen, all the harmony will be put on MIDI Channel 4 and will be no good for Synth V. If you look at Notation Editor after creating harmony with the option, you will see all the notes in the melody. Doing this cannot be undone other by CTRL+Z (Edit >>Undo) immediately after it is done, so it pays to save a backup file before creating harmony in case something goes awry.

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So the bottom line...
1) DO NOT choose "Write harmony to Melody track" when choosing the harmony via ALT+F10 [Harmony >> Melody harmony (select)].
2) Make sure the Type 1 save options are instructed to save the file with the harmony on different tracks.

I'll pass this information onto the Development Team. I think that Synth V and other vocal synths will become very popular so the process to go from BIAB to a vocal synth using MIDI should be more straightforward.

MY SONGS...
Audiophile BIAB 2024