I have a ux1 and a gx, and when I hook up my breedlove nylon string(fishman system) to it it has a horrible hum, this goes away when I ground myself to the computer or the ux1. This does not happen with any of my electric guitars, and it does not happen when I plug this guitar in to my amp. I have tried both the ux1 and the gx, and I have tried multiple leads. The only way I got it to be less, not gone but less was to use a laptop and run off battery