Will try to keep it brief.
Guitar/amp plugged in downstairs.
Volume on guitar up. Guitar just resting against the couch.
Turn on computer upstairs.
Lots of electric hum and buzz from amp downstairs.
Bring computer downstairs.
Set computer up next to amp. Different socket, mind.
Turn on computer. No or negligible hum.
Tried three different sockets upstairs. Same deal. Hum from amp downstairs.
Is there some kind of ground lift or something I can use on my computer or something? I’m open to trying anything at this point. It’s a 27” iMac. Never had such issues with my Mac Mini that preceded it.
I’m thinking the actual Earth on the house, or at least the upstairs ring main needs looking at?
It’s PISSING ME OFF!!!
If I try to record guitar upstairs in the same room as the computer, if I position it just so, the hum largely disappears.
Which is what I don’t understand. The hum is largely position dependent.
I also noticed this downstairs. If I moved the guitar, the hum would get louder and quieter. Even though the computer is upstairs.
No buzz at all when computer is off and no buzz when I set the computer up downstairs (and it’s turned on) right next to the amp/guitar in close proximity.
I don’t understand this at all and it’s severely hacking me off!!!!