When I have midi controller connected, I noticed it gives a slight clicking noise feedback whenever a button is pressed. There also seems to be some input hum on audio in connectors. Sometimes my midi controller stops working, might be due to fiddly usb connector, not sure yet (the placement of this is odd on eurorack module, since I am patching cables and constantly fidging it).
Is this noise feedback on midi device normal? How much power can bela give out to midi device? I connect it both ways, turning on lights etc while running sequences.