Probably not a thing, but a few months ago I had a problem updating and what fixed it was making sure the usb cable was not plugged in while trying to update.
I used to have the Tascam us-122. It was fine for what it was. What I didn't like was the single output. I occasionally DJ still and you can't do a separate headphone out,
I now have the Focusrite Scarlett 18i20 because I don't like unplugging an…
It's the only thing I've ever used USB midi on...regular midi I think is fine.
EDIT: DIN MIDI seems to be the same...I'm blaming Ableton, and just need to figure out track delay I think.
they were the same tempo....just enough off time to sound bad. I imagine I need to use track delay to compensate, just not sure how much. Thought there might be a trick