After looking at your GCode I would recommend reviewing the following post processor parameters:
- Scale Feedrate = false
- First G1 → G0 Rapid = false
- G1s → G0 Rapids = false
- Allow Rapid Z = false
Changing these will not correct the noise issue but will address possible other issues.
By not scaling your feedrate your z changes may be exceeding the MPCNC’s max z.
The hobby version of F360 produces no Rapid moves. While this would seem to be only speed related, it is not. Each cutting should start with a G0 rapid. A rapid moves first in Z then in XY. Without it a drag can occur getting to the start of a cut.
The last two parameters will simply speed up the overall cut times.