It's possible, but I doubt it. If so the software is criminally negligentTo the best of my understanding, there's square wave, and there's sine wave. Every square wave I've run runs with a ringing sound, and, there's a noticeable buzz as you accelerate from a stop. My understanding is the sine wave provides a much "softer" power pulse to the motor. They're much quieter in operation, and they provide smoother acceleration from a stop. So, that in mind, I'm wondering if the stock Bafang Ultra and BBSxx controllers aren't sine wave as well?
My understanding of these high end/aftermarket controllers was that they are the product of software written to a MUCH higher (not to mention newer) standard. Keeping in mind Bafang hasn't changed their software for several years now, it's not hard to consider that a company not resting on their butt has had plenty of time to improve on what Bafang started with. I can understand these aftermarket companies wanting to capitalize on their development work, but at the same time find it unfortunate their work isn't open source like Bafang's.
We KNOW Stefan Penov was able to improve on the older BBSxx configuration software with a total rewrite there. Hopefully us poor folk will soon be able to capitalize on newly written Ultra software written with some of the newer tech. used in the aftermarket controllers, and shared as freeware. Yes, wishful thinking for sure! -Al
And since actual hardware details from Bafang are nonexistent. I'm not sure where we could find the answer other than those doing these aftermarket upgrades.