In USB mode, the transport buttons (record, stop, play) and the 5 other knobs are not being active and can't be assigned to Ableton'sMIDI/Key mappings, which makes my controller totally useless because I can't control my Ableton sessions from KSP. When I click in Ableton the buttons don't respond to the assignments. But the buttons do work because I manage to control my Digitakt from Midi out, so the unit is not faulty.
I've checked Ableton preferences, Sync is ON in and out on the Arturia.
It should work like here at 8min
https://youtu.be/d1kMa2piwyk but it doesn't! You video is too old by the way (2015, Beatstep. 150k views), you should make another one in 2020 for the KSP. I guess I won't be the only complaining on the issue. The manual isn't helpful at all.
Since I have no Midi interface for another 3 weeks because of Corona slowing down my shop deliveries, so my KSP is useless now... well done Arturia.