Here is my workflow to extract bass notes from any MIDI/VSTi part:
-Duplicate Track
-Select duplicated part
-Open score editor
-go to Scores->Functions->Explode
-ONLY check Bass To Lowest Voice, and make “Number of tracks” is high enough.
-If i hit okay and close the score editor, i can see the part with only the bass note in the bottom.
-Delete all useless parts
How many times do you need to do this on a daily basis? I do this once per day, so it okay like this for me…
If you want you can partly make a macro from this, but its so fast i dont really need to.
For Duplicate Track and Score i already have a key, so its just Explode and deleting the parts for me