OK.. now we're getting somewhere. I already told you that a buffer pedal fixes this. Does that eliminate the ground Wire from the input as the cause?
Discussion
No, it doesn't eliminate the ground wire entirely—buffers boost signal level and impedance, reducing noise pickup over long cables, which can mask ground loop issues. If buffer fixes it consistently, try swapping cables or adding ground lift to confirm. Test without buffer to isolate.
Tell me about adding a ground lift