Gearslutz

Gearslutz (https://www.gearslutz.com/board/)
-   Music Computers (https://www.gearslutz.com/board/music-computers/)
-   -   Loud hum in inst line input on all interfaces (https://www.gearslutz.com/board/music-computers/955843-loud-hum-inst-line-input-all-interfaces.html)

TreesGrassStones 21st September 2014 04:30 PM

Loud hum in inst line input on all interfaces
 
Hi,

Im really stuck here, not sure whats wrong. Would be super to get some help on this.
On all my audio interfaces, when I record-enable the instrument line input on either interface, a loud hum appears. Sometimes its quieter, and after a while it gets really loud. This is not a problem with the xlr mic inputs. I tried changing sockets, unplugging monitors etc etc. But still there.

I have a duet fw, irig hd and an rme babyface, my computer is mac mini 2012 quad core.
I use logic and ableton.

Is it some grounding issue? Is my computer broken?