Hey Christopher,

Thanks for replying.

I tried running the amp on batteries and then the buzz disappeared so now Im pretty sure that the problem here is the outlet with no ground. I'm working abroad now and this place has only 2 pronged outlets. I can try plugging my amp when I got home a couple months from now.

After messing with the software for the THR10x I found out that the noise gate can greatly reduce the buzz so I am using that for a temporary fix for now.

As for the other causes:

2. When I use the clean tone the buzz is still there but not quite as loud as with gain.

3. RF interference.

I tried turning off everything in my room but the buzz is still there. But maybe there is a change but I didn't notice it. I could try shielding my guitar though (is this useful), maybe this could further reduce the noise after I solve my outlet groung problem.

4. Faulty grounding

I have also checked your video but I'm sure that I have no faulty ground on my guitar when I checked it with my multimeter.

Thank you for your help man.