USB hum/noise isolation?
"Scott Dorsey" wrote in message
...
If he hears it without only headphones, it's not a ground loop, because
there is only one single ground path. (Well, it COULD be internal
grounding
issues inside the box, but there's nothing he can do about that.)
Was that interface powered by USB or did it have it's own power supply?
There could be a loop.
The best way for him to try is to connect the interface to a laptop running
on it's battery. Headphone on the interface and nothing more. This ensures
there is absolutely no ground loop. If the hum/noise is still there, it must
the interface itself.
Meindert
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