Hi, When I'm playing my guitar, and when I'm not touching any metal on it at all, I have a (what I suppose is) 60 cycle buzz happening. As soon as I touch the metal part on my guitar cable right at the jack, the buzz goes away. Is this what they call RFI or EMI? What do I do about this? Is it my guitar cable? I have a spectraflex cable that I use with an epiphone sheraton with humbuckers. Thanks.