David, Dan got me thinking about the MIDI only option so I did some experimentation. Would you verify this method for me.

1-Load the VSTi with a MIDI song
2-Under generate/custom click on all pages (MIDI only)

I am using BiaB 2021 and when I do the above the generation is almost simultaneously. Also only the tracks' mid files are saved in C:/bb/bbplugin. No audio tracks were generated. This is a game changer for me.

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Why is it that doctors call what they do 'practice'?
If flying is so safe, why do they call the airport, the terminal?

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware