I have my 12 step connected to an iPad Air 2 via the 12 step USB port and the official Apple camera connector.
The iPad is running into a PA system.
The iPad recognizes the 12 step within my synth app. But when I connect the 12 step to the USB power supply that came with my Midi Expander, via the 12 step's expand port, a really loud buzzing comes through my PA system.
Can anyone possibly tell me why that might be happening?
Do I need to use shielded USB cables to connect to the 12 step power adapter possibly?
Any help would be appreciated.
Thanks so much!