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Old 06-21-2013, 01:13 PM   #26
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Join Date: Oct 2007
Location: Lincoln, UK
Posts: 7,585

You do need to check if your interface shield is grounded. And that this ground is continuous through the shield of the guitar lead, the foil shielding behind your backplate and the bridge and strings.

A "Faraday Shield" is no good without grounding. Is your interface grounded? Is your computer grounded? Is it a desktop or laptop?

And finally, is the house electrical ground grounded at all? This would all contribute to the noise you are getting.

Ungrounded guitar amps can be quite dangerous, but if this is just an ungrounded shield then not so bad. Bad domesticnearths could be another thing though. Have you access to a multimeter?

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