I believe you need a MIDI interface like this MOTU unit:

https://motu.com/products/midi/lite

I have been using this MOTU interface for years:

https://motu.com/products/midi/128

I have 4 synths and one audio (It uses MIDI for changing, creating, loading/saving presets) at the same time.

Edit - I do not use these or any other VSTis in BiaB. But I do in my DAW Studio One Pro and all of my previous DAWs like Vision and Cakewalk.

Good luck and I hope this helps.

Last edited by MarioD; 01/15/24 11:02 AM.
When you are at the checkout line and they ask if you found everything say "Why, are you hiding stuff?"

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