1 Yes drivers and latest updates from the Steinberg support site.
2 USB hub with 5 volt power supply.
All units work fine, but only the AI unit has LED dimming.
I also tried three units on the USB hub and three unit directly to the pc, same problem.
Complete new driver installation, same problem.
How do i get the random blinking leds on the pads and knops on all units ?
Thanks for the help.
Greetssssss, 
peter.