And then immediately talked about host slave issues which are not physical but logical and processing. Perhaps you don't understand what physical means?
Truthfully there is nothing to be gained for me continuing this exchange because I in fact have plugged a Keith McMillen k-board into an op-z and a circuit rhythm and noticed it working perfectly, so your truisms are just that you don't know any synths that are battery powered usb hosts, a problem which is entirely unrelated to your inability to understand the difference between physical connectors and the logical models and data processing issues you described as physical in some weird need to repeat what I said while insisting I am wrong.
> Physical layer is the easiest thing to get an adapter for
I'm saying it's not.