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12 Step iPad Air 2 Buzzing

Posted: Tue Feb 03, 2015 2:35 pm
by j_music
Hello

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!