Random Gain sudden changes

[Ilraga]

Hi all
I have a serious issue on my snare, that I’m not able to solve despite months of testing, setting changing and big suffering…
It happens that randomly, while playing, some hits on the snare sounds with higher gain (3-4 steps, I can say) than it is set. This runs for 7-8 hits on the snare, then returns normal, and then again
Gain value on the setting menu does not change, the same all the rest, but the pad is much more sensitive, same as if you have rised the gain value.
This happen randomly: sometimes just as I start play when turning on Megadrum, sometimes never.

I’ve worked hard on the setting many and many times: maybe it seems all OK, without anymore sudden changes, so I save all setting, including the ones of the pad, but maybe on the next session with the same setting, the same problem returns...
My pad is DIY with a Jobeky center trigger, previously I used a DIY alluminium disc trigger, that have the same behavior problem. Also tried with a new cable: same problem.

I've tried all setting changes and combination, without success.
It seems that lowering down gain value and minscan value reduces the frequency of the problem, but not solve it, below my setting

Any suggestion?

IMG_20251022_210545114_HDR1.jpg

[dmitri]

A few possible causes:
1. There is a bad soldering on one of the voltage dividing resistors. If it is a snare then it would be R26 and/or R41.
2. There is a short on one of the voltage dividing resistors. If is a snare then it would be R16.
3. If there is a voltage dividing resistors in the snare then there might be bad contact(s) on the these resisitors.
4. There some noticeable voltage jumps/drops on the usb port to which MegaDrum is connected to.

[Ilraga]

A few possible causes:
1. There is a bad soldering on one of the voltage dividing resistors. If it is a snare then it would be R26 and/or R41.
2. There is a short on one of the voltage dividing resistors. If is a snare then it would be R16.
3. If there is a voltage dividing resistors in the snare then there might be bad contact(s) on the these resisitors.
4. There some noticeable voltage jumps/drops on the usb port to which MegaDrum is connected to.

Many thanks Dmitri!
First attempt was on the easiest causes: cleaned the usb port where MegaDrum is connected to, and sobstitute the usb cable, but no success... I'll move on to check on the soldering and short issues you suggest, but this will need more time. I'll be back asap