@arielbit A quick and dirty grounding trick that I used way back when, was to make a connection to a old metal heater installed in the room. It is grounded so connecting to it grounded the equipment that I had. I think I had a old computer, ungrounded, and had a humming background noise while listening to music. By doing this "foolish" hack, the humming went away. I'm not sure connecting high wattage usage mining rigs to a heater is the right way to go, but maybe it's worth trying out if you tend to get "tickled" every now and then.
most likely the electricity that's leaking to the ground of your audio's ground is causing the disturbance/humming/noise..
there is no heater here, the metal window grill is here is a good ground..how do i know it? i use the live 240V wire and used that ground as a neutral to run a 1000w flat iron runs (at full heating)...typically a not so good ground can run an electric fan or a TV, but not 1000W or more load... somehow i think the metal grills must have been connected to the metal intertwined underneath the cement and connecting into the foundation.
in our place, digging the soil at about 1 meter depth it is already moist or watery...ground here is good.
