On page 5 of the UR22MKii Operations Manual, there’s a hint about using the 5V DC port:
Even when the UR22mkII is connected to a computer, you can supply power via the [5V DC] port by external power supply if the [POWER SOURCE] switch is set to the [5V DC] side. Using an external power supply can help to prevent noise and other audio degradation caused by drawing power from the USB terminal of a computer.
As such, I understand the box can be connected to the computer AND a 5V DC adapter, and that if the power switch was set to 5V, the adapter overrides the computer as the power source. I also understand from a subsequent instruction that the box is required to be connected to the computer in order for the power to come on, regardless of the power source.
However, when I set the switch to the 5V side, the USB indicator light turns off, which suggests no power is coming through.
Does anyone else have the same problem? Or a different understanding of this hint?