First i am green in electronics (practical side) - iv watched, read and got decent knowledge on the theoretical side but lack of funds, locations (no decent shops to even buy anything within 50km) has limited my practical side.
Problem is the PC cases front panel - old case had no issues with static noise, so the motherboard is fine.
The new one however has the ground same as the USB ports - really idiotic design idea.
So i could physically sever the audio/mic from the USB GND. Now for some reason - it doesnt use the HD Audio GND pin itself (
) so id have to rewire/solder somen of it (cutting physically some tracks on circuit etc).
Now however, while at it - i was thinking of a simple, easy EMI filter of some kind - since its close to USB ports that generate fair amount of noise when connected.
Thats where i get stuck - what would be the simplest way to add some basic EMI filtering there?
Altho i will test the pins and the motherboard side cable pinout to make sure that each pin is what i guessed it will be.